| | 41 | Author
| Willy Friedrichsen, Eckard Kujath, Gerd Liebezeit | Requires cookie* | | | Title
| Mesoionische Sechsringheterocyclen, V [1, 2]; Reaktionen von 6-Oxo-6H-1.3-oxazin-3-ium-4-olaten mit o-Chinonen und Heterokumulenen Mesoionic Six-Membered Heterocycles, V [1, 2] Reactions of 6-Oxo-6H-l,3-oxazin-3-ium-4-olates with o-Quinones and Heterocumulenes  | | | | Abstract
| Mesoionic 4,6-Dioxo-l,3-oxazines, o-Quinones, Heterocumulenes, Cycloadditions Mesoionic 6-oxo-6H-1,3-oxazine-3-ium-4-olates (1, 7) react with o-quinones (2, 4) to give compounds 3, 6, which may result from a primary [4+4]cycloaddition and sub-sequent loss of carbon dioxide. Phenyl isocyanate and phenylisothiocyanate react with lh and 9 -possibly via a [2-f 4]cycloadduct -to give 11, 12, 13 and 14, respectively. | | | |
Reference
| Z. Naturforsch. 37b, 222—233 (1982); eingegangen am 10. Juli 1981 | | | |
Published
| 1982 | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0222.pdf | | | | Identifier
| ZNB-1982-37b-0222 | | | | Volume
| 37 | |
| 42 | Author
| Rudy Susilo, Rolf Gmelin, Klaus Roth, Hans Bauer | Requires cookie* | | | Title
| Über die Konformation yon 1.2.4.5-Tetrathian | | | | Abstract
| 1,2,4,5 -Tetrathian The conformation of 1,2,4,5-tetrathian was determined by means of dynamic NMR spectroscopy. The barrier (ilG+) of the chair/twist equilibration is 14.5 kcal/mol and the chair form is more stable than the twist form in this molecule by 1.4 kcal/mol. These experimental data are in excellent agreement with force field calculations. | | | |
Reference
| Z. Naturforsch. 37b, 234—235 (1982); eingegangen am 11. September 1981 | | | |
Published
| 1982 | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0234.pdf | | | | Identifier
| ZNB-1982-37b-0234 | | | | Volume
| 37 | |
| 43 | Author
| Christian Reichardt, Ulrich Rust | Requires cookie* | | | Title
| Synthesen mit aliphatischen Dialdehyden, XXXII [1] Darstellung und Reaktionen N-substituierter 2-Aminomalondialdehyde Syntheses with Aliphatic Dialdehydes, XXXII [1] Syntheses and Reactions of N-Substituted 2-Aminomalondialdehydes | | | | Abstract
| The 2-amino malondialdehyde bis[dimethylacetal] 2 and some of its N-monosubstituted derivatives 7 a-d as well as the o-carboxy benzoyl malondialdehyde 12 have been prepared. With heterocyclic imonium salts these amino malondialdehyde derivatives form, by a twofold condensation reaction, the y-acylamino-substituted pentamethine cyanine dyes 15 a-c, 17, and 18a-b, the UV/Vis and 13 C NMR spectra of which are recorded with respect to the influence of the y-substituent on these spectra. | | | |
Reference
| Z. Naturforsch. 37b, 236—245 (1982); eingegangen am 22. September 1981 | | | |
Published
| 1982 | | | |
Keywords
| 2-Aminomalondialdehyde Derivatives, y-Acylaminopentamethinecyanine Dyes, UV/Vis Spectra, 13 C NMR Spectra | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0236.pdf | | | | Identifier
| ZNB-1982-37b-0236 | | | | Volume
| 37 | |
| 44 | Author
| Karl Folkers, -A, John Humphries, CyrilY. Bowers | Requires cookie* | | | Title
| Evolution of Design and Achievement of Inhibitors of the Luteinizing Hormone-Releasing Hormone as Inhibitors of Ovulation | | | | Abstract
| Luteinizing Hormone-Releasing Hormone Detailed structure-activity studies on inhibitors of the luteinizing hormone releasing hormone (LH-RH) have been described. The most potent ovulation inhibitors have sub-stitutions in positions 1, 2, 3, and 6. Currently four basic structural requirements for potent antiovulatory activity are: a D-aromatic amino acid, such as D-Trp or D-Phe, in position 6; a D-Phe residue in position 2; substitutions in positions 1 and 3. For inhibitors based on substitutions in positions 2, 3, and 6, the substitution of a Pro, N-Me-Leu or D-Trp residue in position 3 is equally acceptable, and gives analogues which inhibit ovulation at 750 ^g/rat. For inhibitors based on substitutions in positions 1, 2, 3, and 6, D-Trp appears necessary in position 3 in order for ovulation to be inhibited at 200 yug/rat. Many analogues based on the [residue 1 , D-Phe 2 , D-Trp 3 , D-Trp 6 ]-LH-RH sequence are known which inhibit ovulation at 200 ^g/rat. These include those analogues having D-<Glu, Ac-Pro, N-Ac-Hyp and N-Ac-Thr in position 1. The choice between L-or D-residues in this position is structure dependent (Ac-L-Pro > Ac-D-Pro, D-<Glu >L-<Glu, etc.). In addition, a "protected" N-terminal residue having some polar character appears to be important. Substitution of the dipeptide residue, <Glu-Pro-, into position 1 has produced a new category of potent ovulation inhibitors based on linear peptides longer than decapeptides. Continued studies on other analogues in this later class could provide more potent inhibitors by (1) utilizing new binding sites on or in the vicinity of the LH-RH receptor(s); (2) altering transportation properties; (3) producing "pro-drugs". The substitution of N-Me-Leu into position 7 was not advantageous, presumably because of the presence of bulky D-aromatic amino acids in position 6. Nonapeptide ethylamide analogues also had very low antiovulatory potencies. The analogue [chlor-ambucil 1 , Leu 2 , Leu 3 , D-Ala 6 ]-LH-RH acted as an agonist, but also inhibited in a modified assay in vitro. Comparative assays measuring the inhibition of LH-RH, and inhibition of ovulation have emphasized other factors of importance to inhibitor design. Although all ovulation inhibitors active at 750 or 200 /zg/rat strongly inhibited in vivo, at a ratio of analogue to LH-RH of 166:1, other analogues of comparable in vitro potency have displayed a range of antiovulatory activities. Similar discrepancies have been observed in the results of in vivo LH-RH inhibition assays. The most potent ovulation inhibitors always inhibited LH-RH at 333:1 in adult male chimpanzees, and at 100:1 in adult male rats. The dissociation of the results of the LH-RH and antiovulatory assays have been rationalized in two cases. The Cpc-analogues were active in inhibiting LH-RH in rats and in chimpanzees when given i.V., but were inactive in rats when given s.c. which is the mode of administration in the antiovulatory assay. The results for inhibition of LH-RH in vivo paralleled the results for inhibition of ovulation, and raised a question as to differences in absorption of peptides though the lipid layers of subcutaneous tissue. The reduced in vivo activities of the L-Trp 3 analogues in both the LH-RH and antiovulatory assays suggest an increase in enzymatic inactivation for these compounds. [D-Phe 2 , Pro 3 , D-Phe 6 ]-LH-RH can inhibit endogenous LH-RH in the Rhesus monkey and inhibit ovulation. Infusion of [D-Phe 2 , Pro 3 , D-Trp 6 ]-LH-RH at 375 ^ug/day for 4 days from a s.c. implanted minipump completely inhibited ovulation in cycling female rats and decreased serum LH levels in castrated rats. In contrast with LH-RH or des-Gly 10 -[D-Ala 6 ]-LH-RH ethylamide the Pro 3 analogue did not block uterine implantation sites of mated rats, indicating a difference in the mechanism of contraception for LH-RH agonists and inhibitors. | | | |
Reference
| Z. Naturforsch. 37b, 246—259 (1982); received July 22 1981 | | | |
Published
| 1982 | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0246.pdf | | | | Identifier
| ZNB-1982-37b-0246 | | | | Volume
| 37 | |
| 46 | Author
| Martin Jansen | Requires cookie* | | | Title
| Neue Silber(I)-germanate New Silver(I)-germanates | | | | Abstract
| Silver(I)-germanates, High-Oxygenpressure Syntheses, Powder Data Four silver(I)-germanates have been prepared from the binary components Ag 2 0 and Ge0 2 by solid state reaction applying elevated oxygen pressures (2500-3000 bar). Ag 6 Ge 2 07isisostructuraltoAg 6 Si 2 07(II) [P2 x ,a= 16.268(3), b = 10.021(2), c = 5.320(1) A, ß = 90.85(2)°], Agi 0 Ge 4 Oi3 to Agi 0 Si 4 Oi 3 [PT, a = 11.731(3), b = 9.147(3), c = 8.727(4) A, a = 99.33(2), ß = 91.61(1), y = 114.27(2)°]. According to the results of preparative investigations and chemical analysis there are two further phases in the system Ag 2 0/Ge0 2 of compositions 'Ag 2 Ge03' and 'Ag 2 Ge 2 Os'. | | | |
Reference
| Z. Naturforsch. 37b, 265—266 (1982); eingegangen am 20. Oktober 1981 | | | |
Published
| 1982 | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0265.pdf | | | | Identifier
| ZNB-1982-37b-0265 | | | | Volume
| 37 | |
| 47 | Author
| Rainer Bartsch, Othmar Stelzer, Reinhard Schmutzler | Requires cookie* | | | Title
| A New Method for the Preparation of Asymmetrically Substituted Phosphiniminophosphonium Salts [Bu w 3P-N=PRa]X | | | | Abstract
| Silylphosphinimine, Tri-n-butylfluorophosphonium Bromide, Metathesis Reactions Tri-n-butylfluorophosphonium bromide and N-trimethylsilylphosphinimines R3P=N-SiMe3 react with formation of trimethylsilyl bromide and fluoride and mixed phosphiniminophosphonium bromides/fluorides, [Bu n 3P-N=PR3]Br/F. Metathetical reac-tions with sodium iodide, ammonium hexafluorophosphate and potassium Perchlorate yield the corresponding phosphiniminophosphonium iodides, hexafluorophosphates and Perchlorates, respectively. The cations [Bu n 3P-N=PR 3 ] + behave as phase-transfer agents. In the presence of these cations permanganate anion is transferred from aqueous solutions into benzene. | | | |
Reference
| Z. Naturforsch. 37b, 267—271 (1982); eingegangen am 28. September 1981 | | | |
Published
| 1982 | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0267.pdf | | | | Identifier
| ZNB-1982-37b-0267 | | | | Volume
| 37 | |
| 48 | Author
| Frank Kübel, Joachim Strähle+ | Requires cookie* | | | Title
| Polymere Dimethyl-und Diphenylglyoximatokomplexe des Cobalts und Eisens mit 4.4' -Bipyridin als Brückenligand. Die Kristallstruktur des Bis(dimethylglyoximato)4.4'-bipyridincobalt(II)* Polymeric Dimethyl-and Diphenylglyoximato Complexes of Cobalt and Iron with 4,4'-Bipyridine as a Bridging Ligand. The Crystal Structure of Bis(dimethylglyoximato)4,4'-bipyridine Cobalt(II) | | | | Abstract
| Polymeric bis(dimethyl-and diphenylglyoximato)-complexes of Fe(II) and Co(II) with 4,4'-bipyridine as a bridging ligand have been synthesized from the glyoximato metal complexes and 4,4'-bipyridine in ethanol. The Co(II) compounds are paramagnetic and surprisingly stable against oxidation. The iron complexes are weak electrical conductors with approximately 10 -9 ß -1 cm _1 . Bis(dimethylglyoximato)-4,4'-bipyridine cobalt(II) crystallizes triclinic in the space group PT with Z — 1. The crystal structure is built up by linear chains of alternating Co(II) glyoximato complexes and axial bonded 4,4'-bipyridine bridges. The compound is characterized by strong Co-N-bonds of 189 pm within the glyoximato moiety and weak bonds of 228 pm to the bipyridine ligand. The two hetero-cycles of the bipyridine are coplanar, therefore the local symmetry of the complex is D 2 | | | |
Reference
| Z. Naturforsch. 37b, 272—275 (1982); eingegangen am 23. Oktober 1981 | | | |
Published
| 1982 | | | |
Keywords
| Iron and Cobalt Glyoximato-4, 4'-Bipyridine Complexes, Synthesis, Crystal Structure | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0272.pdf | | | | Identifier
| ZNB-1982-37b-0272 | | | | Volume
| 37 | |
| 49 | Author
| Ulf Thewalt | Requires cookie* | | | Title
| S4N4 und seine Derivate: Isolierung und Struktur von Pd2(S3N)2(S3N2) S4N4 and its Derivatives: Isolation and Structure of Pd2(S3N)2(S3N2) | | | | Abstract
| The reaction of S4N4 with PdCl2 in methanol yields among other products the dinuclear complex Pd 2 (S3N) 2 (S3N 2) (D): dark red needles, space group R"3 with a = 32.759(15), c = 6.516(4) A and Z = 18. The structure of D was determined by an X-ray analysis. Each palladium atom is part of an almost planar PdSsN metallocycle. The SNSNS group acts as a bridge whereby each of its terminal S atoms is bonded to both Pd atoms. The Pd atoms possess a square planar coordination by four S atoms. The coordination planes form an angle of 114.9°. The Pd-Pd distance of 2.921(2) Ä is rather short. | | | |
Reference
| Z. Naturforsch. 37b, 276—280 (1982); eingegangen am 19. Oktober 1981 | | | |
Published
| 1982 | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0276.pdf | | | | Identifier
| ZNB-1982-37b-0276 | | | | Volume
| 37 | |
| 50 | Author
| Gerd-Volker Röschenthaler, Werner Storzer | Requires cookie* | | | Title
| Ein methylimidoverbrücktes Diphosphoran, in dem Stickstoff nicht Glied eines Ringes ist A Methylimido-bridged Diphosphorane in which Nitrogen is not Member of a Ring | | | | Abstract
| N-Substituted 2-Amino-4,4,5,5-tetrakis(trifluoromethyl)-l,3,2A 3 (A 5)-dioxaphospholanes, Dilithium Perfluoropinacolate, Diazadiphosphetidine, 2,2,2 -Trichloro -4,4,5,5 -tetrakis (trifluoromethyl) -1,3,2 A 5 -dioxaphospholane MeN(PCl 2) 2 reacts with Li 2 [0C(CF 3)2C(CF 3)20] to give MeN{P[0C(CF 3) 2 C(CF 3) 2 0]} 2 which adds chlorine under formation of MeN{PCl 2 [0C(CF 3) 2 C(CF 3) 2 0]} 2 . The chlorophosphorane decomposes slowly to yield PC1 3 [0C(CF 3)C(CF 3) 2 0] and the diazadiphosphetidine {MeNPCl[OC(CF 3) 2 C(CF 3) 2 0]} 2 . | | | |
Reference
| Z. Naturforsch. 37b, 281—283 (1982); eingegangen am 15. Oktober 1981 | | | |
Published
| 1982 | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0281.pdf | | | | Identifier
| ZNB-1982-37b-0281 | | | | Volume
| 37 | |
| 51 | Author
| HansH. Karsch | Requires cookie* | | | Title
| Funktionelle Trimethylphosphanderivate, XVII [1] | | | | Abstract
| Methyl-bis(dimethylphosphinomethyl)phosphan, (Me2PCH2)2PMe Functional Derivatives of Trimethylphosphane, XVII [1] Methyl-bis(dimethylphosphinomethyl)phosphane, (Me2PCH2)2PMe (Me 2 PCH2)2PMe (3) is obtained from MePCl 2 (2a) or MeP(OPh) 2 (2b) and LiCH 2 PMe 2 (1). The oxides [Me 2 P(0)CH 2 ] 2 PMe (4) and [Me 2 P(0)CH 2 ] 2 P(0)Me (5), are formed on the reaction with air. Quaternisation with Mel gives the salts [(Me3PCH2)2PMe]l2 (6) and [(Me3PCH2)2PMe2]l3 (12). For comparison, also the isoelectronic (Me3SiCH2)2PMe (7), and (Me3SiCH2)2P 4 Bu (8), are synthesized and transformed to their methylphosphonium salts 10 and 11. WithCH 2 Br 2 , 3 forms the six-membered heterocycle [MeP(CH 2 PMe2)2CH 2 ]Br2 (13 a), which could not be isolated in a pure state, however. 3 may be metalated by LiBu: Li[Me2PCHP(Me)CH2PMe2] (15), is obtained, but a second metalation step could not be observed. The hydrolysis of 12 under unusual mild conditions (H2O or H2O/CH3OH) gives [Me2P(0)CH 2 PMe3]I (16), and [Me 4 P]I (17), as main products. Properties and NMR data of the new compounds are described. | | | |
Reference
| Z. Naturforsch. 37b, 284—291 (1982); eingegangen am 12. Oktober 1981 | | | |
Published
| 1982 | | | |
Keywords
| Triphosphane (PCPCP), Phosphonium Salts, Hydrolysis, NMR Spectra | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0284.pdf | | | | Identifier
| ZNB-1982-37b-0284 | | | | Volume
| 37 | |
| 52 | Author
| Moisés Morán, Augusto Ibáñez, J. R. Masaguer | Requires cookie* | | | Title
| Reactions of r/-C5H5Co(CO)2 and ^-Me3SiC5H4Co(CO)2 with (XCN)2 and X(CN)2 (X = S or Se) | | | | Abstract
| The pseudohalogens (XCN) 2 (X = S or Se) react with ^-C5H 5 Co(CO)2 and 7;-Me3SiC5H4Co(CO)2 with formation of the 18 electron complexes, RCo(CO)(XCN)2 (R = r]-C5H5 or ^-MeßSiCsBU). By reactions with X(CN)2 (X = S or Se), the cyclopentadienyl cobalt dicarbonyls are transformed into the mixed complexes, RCo(CO)(CN)(XVN) (R = ^-CÖHÖ or ^-MesSiCsH^. All the compounds are characterized by elemental analysis, IR, electronic and 1 H NMR spectra. The thiocyanogen derivatives undergo linkage isomerism (N->S) in polar solvents. | | | |
Reference
| Z. Naturforsch. 37b, 292—298 (1982); received September 21/November 9 1981 | | | |
Published
| 1982 | | | |
Keywords
| Pseudohalogens, Electron Complexes, 1 H NMR Spectra | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0292.pdf | | | | Identifier
| ZNB-1982-37b-0292 | | | | Volume
| 37 | |
| 53 | Author
| Marianne Baudler, Yusuf Aktalay, Thomas Heinlein, Karl-Friedrich Tebbe | Requires cookie* | | | Title
| Contributions to the Chemistry of Phosphorus, 109 [1] J-BueAs2P6 -the First Phosphorus Arsenic Polycycle | | | |
Reference
| Z. Naturforsch. 37b, 299—305 (1982); eingegangen am 12. Oktober 1981 | | | |
Published
| 1982 | | | |
Keywords
| 2, 2', 3, 3', 4, 4'-Hexa-ter<-butyl-l, l / -diarsa-2, 2', 3, 3', 4, 4'-hexaphospha-bicyclobutane, Phosphorus Arsenic Polycycle, Heterocyclophosphanes, Crystal Structure | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0299.pdf | | | | Identifier
| ZNB-1982-37b-0299 | | | | Volume
| 37 | |
| 55 | Author
| Lutz Dahlenburg, Fazlollah Mirzaei, Ah Yardimcioglu | Requires cookie* | | | Title
| Alkyl-und Arylkomplexe des Iridiums und Rhodiums | | | | Abstract
| , IX [1] Organorhodiumverbindungen Rh(R)(CO)(PPh3)2 (R = Alkyl, Aryl) und homologe Iridiumalkyle Alkyl and Aryl Complexes of Iridium and Rhodium, IX [1] Organorhodium Compounds Rh(R)(CO)(PPh3)2 (R = Alkyl, Aryl) and Related Iridium Alkyls A series of organorhodium and -iridium complexes M(R)(CO)(PPh 3)2 (M = Rh: R = CeHs, 2-MeC6H4, 4-MeC6H4, 2,4,6-Me3C6H2, CH3, CH2SiMe3, CH2CMe3; M = Ir: R = CH3, CH2Ph, CH2SiMe3, CH2CMe3) has been prepared from MCl(CO)(PPh3)2 and the correspond-ing organolithium or Grignard reagents. Of these compounds, the mesitylrhodium complex Rh(2,4,6-Me3C6H2)(CO)(PPh3)2 as well as the iridium and rhodium alkyls with Me3SiCH2 and Me3CCH2 ligands show cis,irans-isomerism which is demonstrated on the basis of infrared and NMR spectroscopic evidence. | | | |
Reference
| Z. Naturforsch. 37b, 310—317 (1982); eingegangen am 23. Oktober 1981 | | | |
Published
| 1982 | | | |
Keywords
| Rhodium, Iridium, Organometallic Compounds, eis, frarw-Isomerism, NMR Spectra | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0310.pdf | | | | Identifier
| ZNB-1982-37b-0310 | | | | Volume
| 37 | |
| 57 | Author
| Heindirk Torn, Dieck, Ewald Kühl | Requires cookie* | | | Title
| Zur Elektrochemie von Metall(O)-Verbindungen, V [1] Reaktionen von Diazadien-Metall(VIb)-carbonylkationen und -anionen Electrochemistry of Metal(O) Compounds, V [1] Reactions of Diazadiene Metal(VIb) Carbonyl Cations and Anions | | | | Abstract
| Cyclic Yoltammetry, Diazadiene Chromium, Molybdenum and Tungsten Carbonyls, Oxidation States +1 and —I Carbonyl complexes of chromium, molybdenum and tungsten of the type DAD M(CO)4 with DAD — diazadiene (R-N=CR'—CR'=NR) are shown by cyclic voltammetry to undergo electron transfer reactions to [DAD M(CO)4] + and [DAD M(CO)4]~. The rate of subsequent chemical reactions with nucleophiles or by loss of ligands depend on the sol-vent, the metal and the ligands' electronic and steric properties. Chromium(+ I) is more readUy stabilized than Mo(+ I) or W(-f I) while the opposite is true for the stability of the anions formed. The dimerisation of a low-coordinate species DAD Mo(CO)3 from the reduction of DAD Mo(CO)3(CH3CN) is detected electrochemically. The stabilization of oxidation states +1 and —I is briefly discussed in view of the DAD ligand properties. | | | |
Reference
| Z. Naturforsch. 37b, 324—331 (1982); eingegangen am 27. Oktober 1981 | | | |
Published
| 1982 | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0324.pdf | | | | Identifier
| ZNB-1982-37b-0324 | | | | Volume
| 37 | |
| 58 | Author
| Thomas Gerdau, Reinhard Kramolowsky | Requires cookie* | | | Title
| Koordinationschemie von Liganden mit den Donatoren Phosphor und Schwefel, I Nickel(II)-Komplexe mit Phosphinomethylthioethera als Liganden Gleichgewicht zwischen planarem und tetraedrischem Nickel(II) Coordination Chemistry of Ligands with the Donors Phosphorus and Sulfur, I Nickel(II) Complexes with Phosphinomethylthioethers as Ligands A Planar-Tetrahedral Equilibrium with Nickel(II) | | | | Abstract
| The preparation and structural characterization of phosphinomethylthioethernickel(II) complexes of the general type [NiX2(Ph2PCH2SR)2] (X = CI, Br, I, NCS: R = Me, Ph) are reported. In all the complexes the phosphinomethylthioethers act as monodentate ligands coordinating via the phosphorus atom. The isothiocyanate complexes are diamagnetic both in solution and in the solid state and have been assigned trans-planar configuration. As shown by magnetic measurements and by electronic spectroscopy, the halo complexes exhibit a square-planar (diamagnetic) ^ distorted-tetrahedral (paramagnetic) equilibrium in solution, while in the solid state the complexes are either square-planar or distorted-tetrahedral. For the complex [NiBr2(Ph2PCH2SMe)2] both isomers have been isolated in the solid state. | | | |
Reference
| Z. Naturforsch. 37b, 332—340 (1982); eingegangen am 20. November 1981 | | | |
Published
| 1982 | | | |
Keywords
| Phosphinomethylthioethernickel(II) Complexes, Planar-Tetrahedral Equilibrium, Electronic Spectra, Magnetic Properties | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0332.pdf | | | | Identifier
| ZNB-1982-37b-0332 | | | | Volume
| 37 | |
| 59 | Author
| Hartmut Müller, Arno Holzmann, Winfried Hinrichs, Günter Klar | Requires cookie* | | | Title
| Acyclische Liganden mit fixierter Koordinationsgeometrie, I l:2-Komplexe von Cobalt(II) mit den Anionen von 2.2'-Dihydroxydiphenyloxid und -sulfid -Kristall-und Molekülstruktur von Natrium-bis[diphenylsulfid-2.2 -diolato(2-)]cobaltat(II>- Aceton-Wasser (1/2/1) | | | | Abstract
| Acyclic Ligands with Fixed Coordination Geometry, I 1:2 Complexes of Cobalt(II) with the Anions of 2,2'-Dihyydroxydiphenyloxide and -sulfide -Crystal and Molecular Structure of Sodium bis[diphenylsulfide-2,2'-diolato(2-)]cobaltate(II)-Acetone-Water (1/2/1) Bis[dipheny lchalcogenide -2,2' -diolato (2 -) ] cobaltate (H), Bidentate diphenyloxide-2,2'-diolate, Tridentate Diphenylsulfide-2,2'-diolate | | | |
Reference
| Z. Naturforsch. 37b, 341—347 (1982); eingegangen am 23. Oktober 1981 | | | |
Published
| 1982 | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0341.pdf | | | | Identifier
| ZNB-1982-37b-0341 | | | | Volume
| 37 | |
| 60 | Author
| Dieter Rehder, Uwe Puttfarcken | Requires cookie* | | | Title
| Ethyldiphenylphosphin | | | | Abstract
| und 1.2-Bis [bis(/5-diphenylpho8phinoethyl)pho8phino] ethan: Derivate des Hexacarbonyl]iydridovanadium(-f-1) und Hexacarbonylvanadat(—I) Ethyldiphenylphosphine and l,2-Bis[bis(/?-diphenylphosphinoethyl)phosphino]ethane: Derivatives of Hexacarbonylhydridovanadium(+1) and Hexacarbonylvanadate(—I) The coordination properties of Ph2PEt (pi) and (Ph2PCH2CH2)2PCH2CH2P(CH2CH2PPh2)2 (P2P4) towards HV(CO)6 and [V(CO)6]-are compared. Preparation and spectral properties (IR, X H, 31 P and 51 V NMR) are described for the complexes HV(CO)4(pi)2, [Et4N][V(CO)6-"(pi)N] (n = 1, 2), HY(CO)MP2P4 (m = 1-5) and [Et4N][V(CO) 111P2P4] (M = 1—3). The anionic species are obtained by photo-induced CO exchange, the hydrido complexes by treatment of the anionic complexes with <-BUC1/H20 or -more conveniently -by ion exchange on silica gel (m — 1-3) and sub-sequent UY irradiation (m = 4, 5). Complexes containing four CO groups are cis-con-figurated, the pi species being extremely labile. Trisubstitution yields an isomeric mixture ofmer-and fac-[V(CO)3p2p4] -. A consistent explanation of the X H pattern in the hydride region is possible on the basis of a facecapped octahedral structure with a restricted dynamic behaviour. The positions of the CO ligands in HV(CO)3p2p4 and HV(CO)2P2P4 are facial and trans, respectively. Only chelate five-ring structures are formed. | | | |
Reference
| Z. Naturforsch. 37b, 348—354 (1982); eingegangen am 23. Oktober 1981 | | | |
Published
| 1982 | | | |
Keywords
| Carbonylvanadium, Carbonylvanadiumhydride, Vanadium-NMR, Dynamics | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0348.pdf | | | | Identifier
| ZNB-1982-37b-0348 | | | | Volume
| 37 | |
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