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1Author    Z.Requires cookie*
 Title    Versuche zur Kondensation von H exam ethyl-4.4-bis(m ethyIam ino)cyclo- 1.2.4-trisila-diazan * Preparation  
 Abstract    Attem pts for the Condensation of Hexamethyl-4.4-bis(methylamino)cyclo-1 ,2,4-trisila-diazane M e r t e n S c h l i n g m a n n u n d U l r ic h W a n n a g a t Braunschweig, 
  Reference    (Z. Naturforsch. 32b, 954—955 [1977]; eingegangen am 31. Mai 1977) 
  Published    1977 
  Keywords    Properties, Structure, Spiranes 
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 TEI-XML for    default:Reihe_B/32/ZNB-1977-32b-0954_n.pdf 
 Identifier    ZNB-1977-32b-0954_n 
 Volume    32 
2Author    Ulrich Wannagat, Merten Schlingmann, Horst AutzenRequires cookie*
 Title    Anorganische Fünfringsysteme auf der Basis Silicium/ Stickstoff/Heteroelement * Inorganic Fivemembered Ring Systems Basing upon Silicon, Nitrogen and "Hetero Elements"  
  Reference    (Z. Naturforsch. 31b, 621—640 [1976]; eingegangen am 2. Oktober 1975) 
  Published    1976 
  Keywords    Survey, Preparation, Properties, Structure, Spiranes 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0621.pdf 
 Identifier    ZNB-1976-31b-0621 
 Volume    31 
3Author    Ulrich Wannagat, Gerd EiseleRequires cookie*
 Title    Neue Silaza-und Silaoxaza-spiro[4.4]nonane und [4.5]decane* Novel Silaza-and Silaoxaza-spiro[4,4]nonanes and [4,5]decanes  
 Abstract    The formerly unknown spiro systems C-F (Scheme I) with silicon in the spiral center and C, Si, N and O in the framework were synthesized via reactions 2-6 and confirmed in their structure by elemental analysis and spectroscopic data (Table I). 
  Reference    Z. Naturforsch. 33b, 471—474 (1978); eingegangen am 28. Februar 1978 
  Published    1978 
  Keywords    Preparation, Properties, Spiranes, Structure 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0471.pdf 
 Identifier    ZNB-1978-33b-0471 
 Volume    33 
4Author    K. Irumakki, N. ShivaramRequires cookie*
 Title    Purification and Properties of Potato Phosphorylase Isozymes  
 Abstract    Two multiple forms of a-glucan phosphorylase which migrate about half way in polyacryl-amide-gel electrophoresis (named "slow" and "fast" isozyme), were isolated by combined chromato­ graphy and preparative electrophoresis after freezing the tissue from freshly harvested and from sprouting potato tubers respectively. Depending on the primer used for the synthesis reaction their pH optimum varied between 5.2 and 6.0 and the optimum temperature was 30 and 35 °C. The isoelectric point for the slow isozyme was at pH 5 .0 + 0.1 and for the fast isozyme, pH 5 .5 + 0.1, the molecular weights were 209 000 + 10 000 and 165 000 + 5000 and for their subunits 104 000 + 4000 and 40 000 + 2000 respectively. Both isozymes were inhibited by Hg2+, Ag+ and p-chloromercuro-benzoate (p-CMB). Fe2+ ions inhibited them partially. Mg2+, Mn2+ and sulfhydryl compounds acti­ vated both. K m values for the slow and fast isozymes with glucose-l-phosphate in presence of soluble starch was 6.7 and 8.0 mM, of amylose 14.3 and 20.0 mM and of glycogen 22.2 and 40.0 mM respectively. The affinity of the primer for the slow and the fast isozymes were as follows: soluble starch 0.5 and 1.0 mM, amylose 2.6 and 3.8 mM, glycogen 6.2 and 7.7 mM respectively. K m values of phos-phorolysis with soluble starch was 0.8 and 0.5 mM, with amylose was 3.1 and 1.1 mM, and with glycogen was 6.5 and 1.3 mM respectively. As substrate and primer the soluble starch was superior and the glycogen was inferior. Amylose was in between. Kinetic parameters suggested the existence of a-glucan phosphorylase isozymes with different specificities: the slow one being more active in the direction of starch synthesis and the fast iso­ zyme degrading faster the polyglucans. These observations suggest that the polyglucan synthesis and degradation in potato tubers may be regulated by the change in the proportion of slow and fast isozymes. ' 
  Reference    (Z. Naturforsch. 31c, 424 [1976]; received April 5 1976) 
  Published    1976 
  Keywords    Potato, Phosphorylase, Isozymes, Purification, Properties 
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 TEI-XML for    default:Reihe_C/31/ZNC-1976-31c-0424.pdf 
 Identifier    ZNC-1976-31c-0424 
 Volume    31 
5Author    Ingrid Gentzen, Hans-G Löffler, Friedh SchneiderRequires cookie*
 Title    Aminoacylase from Aspergillus oryzae. Comparison with the Pig Kidney Enzyme  
 Abstract    Am inoacylase (EC 3.5.1.14) from Aspergillus oryzae was purified from a com m ercially available crude material by heat treatment, precipitation by polyethyleneim ine and amm onium sulfate, gel chromatography and preparative disc-gel-electrophoresis. The purified product was hom ogenous as judged by polyacrylamide gel electrophoresis. SDS-gel electrophoresis, polyacrylam ide-gel-gradient electrophoresis, gel chromatography and amino acid analysis demonstrated the enzyme to be com posed o f two subunits with M r o f 36 600. The kinetic properties o f the enzyme were studied with chloroacetyl derivatives o f alanine, phenylalanine, methionine, leucine, norleucine and tryptophan. The pH optim um o f the acylase activity with chloroacetyl-alanine as substrate is at pH 8.5. Acyl derivatives o f hydrophobic am ino acids are preferred substrates. The enzyme has no dipeptidase activity. Am inoacylase is not inhibited by SH -blocking agents and no SH-groups could be detected with Ellman's reagent in the native and denatured enzyme. The enzyme activity is insensitive to phenylmethylsulfonyl fluoride and N-a-/?-tosyl-L-lysine chlorom ethyl ketone. The microbial acylase is a zinc m etallo enzyme. M etal chelating agents are strong inhibitors; it is further inhibited by Cd2+, Mn2+, N i2+, C u2+ and activated by C o2+. The properties o f pig kidney and Aspergillus acylase are compared. 
  Reference    Z. Naturforsch. 35c, 544 (1980); received February 21 1980 
  Published    1980 
  Keywords    Aspergillus Am inoacylase, Purification, Properties 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0544.pdf 
 Identifier    ZNC-1980-35c-0544 
 Volume    35 
6Author    Cornelia Fuchs, G.Erd HansenRequires cookie*
 Title    Partial Purification and Some Properties of Brassica napus Lipase  
 Abstract    Lipase (triacylglycerol acylhydrolase EC 3.1.1.3) from rape (Brassica napus cv. Ceres) was isolated from cotyledons of dark-grown seedlings. The enzyme was partially purified by poly­ ethylene glycol precipitation. Delipidation of the lipase with «-hexane was required prior to further purification by anion exchange chromatography and size exclusion chromatography. A purification factor of 337 was ultimately achieved and the purification process was moni­ tored by SDS-PAGE. Here, at least two protein bands with molecular masses of 62 and 64 kD a respectively were found in the active fraction obtained by size exclusion chrom atogra­ phy. Sodium deoxycholate was found to stimulate the lipase activity, but appeared to cause aggregation of the enzyme. It was not possible to estimate the isoelectric point of the dialyzed rape lipase due to the high molecular mass of the aggregates. Two simple methods to detect lipase activity directly on polyacrylamide gel were applied. No esterase activity was found by using p-nitrophenyl acetate as substrate. 
  Reference    Z. Naturforsch. 49c, 293—301 (1994); received November 3 1993/March 7 1994 
  Published    1994 
  Keywords    Lipase, Rape, Purification, Properties 
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 TEI-XML for    default:Reihe_C/49/ZNC-1994-49c-0293.pdf 
 Identifier    ZNC-1994-49c-0293 
 Volume    49 
7Author    Requires cookie*
 Title    Darstellung und Eigenschaften von Ca2PCl und Sr2PCl  
 Abstract    Alkaline Pure alkaline earth halides MX2 with M = Mg, Ca, Sr, Ba and X = C1, Br, J were prepared by reaction of the metals with the corresponding ammonium halides in N H 3 as solvent. Brown Ca2PCl and dark-brown-violet Sr2PCl were obtained by reaction of metal chloride, metal and red phosphorous in the ratio 1:3:2. Analytical results, densities and lattice constants are given. 
  Reference    (Z. Naturforsch. 30b, 165—168 [1975]; eingegangen am 22. Oktober/27. November 1974) 
  Published    1975 
  Keywords    Earth Halides, Preparation, Properties, Alkaline Earth Phosphide Chlorides 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0165.pdf 
 Identifier    ZNB-1975-30b-0165 
 Volume    30 
8Author    Claus HadenfeldtRequires cookie*
 Title    Darstellung und Eigenschaften von Ca2AsBr, Sr2AsCl und Ca3AsBr3 Preparation and Properties of Ca2AsBr, Sr2AsCl, and Ca3AsBr3  
 Abstract    Dark-brown Ca2AsBr and yellow-green Ca3AsBr3 were prepared by reaction of Ca, As, and CaBr2 at 900-1000 °C and 760-800 °C resp., dark-violet Sr2AsCl from Sr, As, and SrCl2 at 900-1000 °C. Ca2AsBr possesses an extended homogeneity range (Ca2AsBr to Ca2.5AsBr2), Sr2AsCl only a narrow one; Ca3AsBr3 is a stoichiometric compound. In contrary to Ca2AsBr Ca3AsBr3 is not stable at 1000 °C. Analytical results, densities, and lattice constants of the phases are given. 
  Reference    (Z. Naturforsch. 31b, 408—410 [1976]; eingegangen am 13. Oktober/1. Dezember 1975) 
  Published    1976 
  Keywords    Calcium Phosphide Bromides, Strontium Arsenide Chloride, Preparation, Properties 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0408.pdf 
 Identifier    ZNB-1976-31b-0408 
 Volume    31 
9Author    Kurt WalentaRequires cookie*
 Title    ZrSi04 mit monokliner Baddeleyitstruktur ? ZrSi04 with Monoclinic Baddeleyite Structure ?  
 Abstract    A new compound having the same composition as zircon, ZrSiC>4, but differing from it in its structure has been obtained by heating zircon particles to a temperature of 5000 to 10000 °K. According to X-ray powder diffraction data the structure and within limits of error also the unit-cell dimensions are identical with that of monoclinic baddeleyite, Zr02. This suggests that the baddeleyite lattice can not only accommodate 10 molecular % Si02 as is already known for some time, but substantially more, unless it is assumed that some kind of submicroscopic exsolution of amorphous Si02 has taken place. 
  Reference    (Z. Naturforsch. 31b, 1175—1178 [1976]; eingegangen am 31. Januar/24. März 1976) 
  Published    1976 
  Keywords    Zircon, Synthesis, Properties, Structure, Baddeleyite Lattice 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-1175.pdf 
 Identifier    ZNB-1976-31b-1175 
 Volume    31 
10Author    Ulrich Wannagat, Gerd EiseleRequires cookie*
 Title    Ringschlußversuche mit Phenylborsäure* Attempts for Synthesis of Inorganic Rings with Phenylboric Acid  
 Abstract    The inorganic ring systems BNC>2Si2 (B) and BC>3Si4 (E) were prepared for the first time via equations (1) and (5), system BC>3Si2 (C) enlarged by preparation of compound C 1 via eq. (4). Synthesis of a system BC>2Si2 (D) failed as well as preparation of five and seven membered building units VI and VIII. For bis(trimethylsiloxy)phenylborane (IX) detailed and additional information about preparation, properties and structure analysis is given. Compound VTI, CsH^NOSi, was obtained for the first time via eq. (7) and described in its properties. 
  Reference    Z. Naturforsch. 33b, 475—478 (1978); eingegangen am 28. Februar 1978 
  Published    1978 
  Keywords    Preparation, Properties, Inorganic Ring Systems, Structure 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0475.pdf 
 Identifier    ZNB-1978-33b-0475 
 Volume    33 
11Author    Joachim Fuchs, Ernst-Peter FlindtRequires cookie*
 Title    Darstellung und Strukturuntersuchung von Polywolframaten Ein Beitrag zur Aufklärung des Parawolframations A A Contribution to the Paratungstate A Problem  
 Abstract    Polytungstates are obtained by the reaction of hydrated tungsten (VI) oxide with bases or salts after occasional addition of organic solvents. With liquid ammonia the as yet unknown ditungstate, (NH4)2W2Ü7, is produced. Its IR spectrum has few absorption bands suggesting a very simple constitution. Piperidine yields 5 compounds according to varied experimental conditions, which all exhibit approximately paratungstate composi-tions but different crystal habits, lattice parameters, solubility and IR spectra. Structure determinations indicate that two of these compounds are heptatungstates, the anion of which, W7024 6-, has the same structure as the heptamolybdate ion, Mo7024 6 ~. From a comparison of their Raman spectra with the spectrum of a freshly acidified sodium tungstate solution (designated as Paratungstate A) it may be concluded that the heptatungstate ion is the predominant species in such a solution. The anion structure of the previously described tributylammonium(5:24):tungstate [(GiHg^NHJsHaW^C^o was elucidated by X-ray methods. Here the tungsten atoms show the same arrangement as in the a-dodecatungstatophosphate ion (Keggin structure). 
  Reference    Z. Naturforsch. 34b, 412—422 (1979); eingegangen am 28. November 1978 
  Published    1979 
  Keywords    Properties, X-ray, Heptatungstate, Paratungstate A, Metatungstate 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0412.pdf 
 Identifier    ZNB-1979-34b-0412 
 Volume    34 
12Author    Abdel-Fattah Shihada, Rehab MajedRequires cookie*
 Title    Darstellung und spektroskopische Untersuchungen von Me3SiOP(S)Cl2, Me3SiOP(S)Br2 sowie Me3Si0P(0)Br2 Preparation and Spectroscopic Properties of Me3SiOP(S)Cl2, Me3SiOP(S)Br2 and Me3Si0P(0)Br2  
 Abstract    Trimethylsilyl dichlorothiophosphate (Me3SiOP(S)Cl2) and trimethylsilyl dibromothio-phosphate (Me3SiOP(S)Br2) are prepared by reactions of (Me3Si)2S with P0C13 and POBr3, respectively. The reaction of POBr3 with Me3SiOCOCH3 in the mol ratio 1:1 gives Me3Si0P(0)Br2, a molar ratio of 1:3 leads to (Me3SiO)3PO. The vibrational spectra have been used to elucidate the structures of the compounds. It was found that -0P(S)C12 as well as -OP(S)Br2 are linked to the trimethylsilyl group through the oxygen atom. 
  Reference    Z. Naturforsch. 35b, 976—980 (1980); eingegangen am 7. März 1980 
  Published    1980 
  Keywords    Preparation, Properties, Vibrational Spectra, 31 P NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0976.pdf 
 Identifier    ZNB-1980-35b-0976 
 Volume    35 
13Author    Roland Schmidt, Wolfgang Hiller, Gerhardt PausewangRequires cookie*
 Title    Peroxofluorokomplexe der Übergangsmetalle, V [1-3]  
 Abstract    Kristallstruktur von K2Ti(02)F4 • H20 (orange) mit einem Di(/i-fluoro)diperoxo-hexafluorodititanat(IV)-Anion Transition Metal Peroxofluoro Complexes, V [1-3] Crystal Structure of K2Ti(02)F4 • HcO (orange) with a Di(J«-fluoro)diperoxo-hexafluorodititanate(IV) Anion Orange crystals of K2Ti(02)F4 ' H20 have been obtained from aqueous solution. The crystal structure (space group P2i/n, a = 604.3(3), b = 1424.6(4), c = 761.0(2) pm, ß = 103.98°, Z = 4, dc = 2.63 gem-3 , dm = 2.62 gem-3 , R = 0.051 for 2257 independent reflections) shows isolated di(ja-fluoro)-bridged [Ti2(02)2Fg] 4 -anions, which are inter-connected by hydrogen bonded H20 forming infinite chains. 
  Reference    Z. Naturforsch. 38b, 849—851 (1983); eingegangen am 17. März 1983 
  Published    1983 
  Keywords    K2Ti(02)F4 @BULLET H20, Crystal Structure, Preparation, Properties 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0849.pdf 
 Identifier    ZNB-1983-38b-0849 
 Volume    38 
14Author    M. Arkus Wieber, Isa Fetzer-KremlingRequires cookie*
 Title    Darstellung von einigen Phenyldicarboxylatostibanen Syntheses of Some Phenyldicarboxylatostibanes  
 Abstract    Som e phenyldicarboxylatostibanes of the general formula C6H 5S b (O C -R) ; were synthesized O by simple m etathesis reactions from phenyldiethoxystibane and carboxylic acids in the ratio 1:2. By reaction o f 1,2-dicarboxylic acids with phenyldiethoxystibane in the ratio 1:1 phenyldicarboxyl­ atostibanes are also obtained. Som e properties and the 'H NM R spectra o f these com pounds are described, IR data are reported and discussed. 
  Reference    Z. Naturforsch. 39b, 754 (1984); eingegangen am 22. D ezem ber 1983 
  Published    1984 
  Keywords    Phenyldicarboxylatostibanes, Cyclic Derivatives, Synthesis, Properties, Spectra 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0754.pdf 
 Identifier    ZNB-1984-39b-0754 
 Volume    39 
15Author    S.Requires cookie*
 Title    Untersuchungen an Stickstoff-Jod-Verbindungen, XV1 Neue Addukte des StickstofFtrijodids mit tertiären N-Basen - Chinuclidiniumpentajodid (Chin H )J3-J2, ein neues Polyjodid  
 Abstract    tu d ies on N itrogen -Iod in e Com pounds, X V 1 N ew A d d u cts o f N itrogen Triiodide w ith T ertiary N -B ases -C hinuclidinium pentaiodide (Chin H)I 3 • I 2, a N ew P olyiodide J o c h e n J a n d e r , H a n s P r it z k o w u n d K l a u s -U w e T r o m m s d o r f f New adducts of nitrogen triiodide with several tertiary N-bases have been prepared. Their analyses, general properties, IR-spectra and structures are reported briefly. E x ­ periments to crystallize a compound with a ratio N : I : chinuclidin = 1:4:1 resulted in the preparation of cristallized chinuclidiniumpentaiodide (chin H)l3 -l2 , the X-ray structure analysis of which is reported. 
  Reference    (Z. Naturforsch. 30b, 720—723 [1975]; eingegangen am 21. April/20. Mai 1975) 
  Published    1975 
  Keywords    Nitrogentriiodide, Tertiary N-bases, Adducts, Properties, Chinuclidiniumpentaiodide, X-ray 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0720.pdf 
 Identifier    ZNB-1975-30b-0720 
 Volume    30 
16Author    Jochen Jander, Alexander MaurerRequires cookie*
 Title    Untersuchungen an Stickstoff-Iod-Verbindungen, XVII [1] Weitere tertiäre N-Basen als Stabilisatoren des Iodonium-Kations und der Iodhalogenide Studies on Nitrogen-Iodine Compounds, XVII [1] Further Tertiary N-Bases as Stabilizers of the Iodonium Cation and Iodine Halides  
 Abstract    The preparation and properties of the new compounds [1(2,4 lutidine)2]N03, -C104, [1(2,6 lutidine)2]N03, -C104, [1(2,4,6 collidine)2]N03, -C104, [I(TEDA)2]N03, [I(quinu-clidine)2]SbCl6, quinuclidine • IBr, quinuclidine • IC1, quinuclidine • IClSbCls, TED A • I2, I2 • TEDA • I2, and C1I • TEDA • IC1 are reported. The molecular vibrations and force constants are compared to those of similar compounds previously prepared. 
  Reference    Z. Naturforsch. 33b, 1446—1451 (1978); eingegangen am 3. August 1978 
  Published    1978 
  Keywords    Bis-base-iodonium Salts, Mono-base-iodine Halides, Preparation, Properties, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1446.pdf 
 Identifier    ZNB-1978-33b-1446 
 Volume    33 
17Author    Axel Thiele, Joachim FuchsRequires cookie*
 Title    Struktur und Schwingungsspektren von Monomolybdaten und Monowolframaten organischer Kationen Structure and Vibrational Spectra of Monomolybdates and Monotungstates with Organic Cations  
 Abstract    The crystal structures of dicyclohexylammonium-monomolybdate dihydrate [(C6Hh)2NH2]2MO04 • 2 H2O, (I), cyclohexylammonium-monomolybdate, (C6HHNH3)2MO04, (II) and terf-butylammonium-monotungstate, (C4HgNH3)2W04, (III), were elucidated. In I the anion has nearly tetrahedral structure, in II one Mo-0 distance is significantly shorter than the other three, and in III all four W-0 distances are different. In spite of the variety of structures the following basic principles are recognizable: 1) Each hydrogen atom of the cationic amino groups as well as of the water of crystallization forms hydrogen bridges. 2) Never are oxygen atoms of the same M0O4 connected by these bridges, but always oxygen atoms of neighbouring M0O4 units. 3) From an oxygen atom emanate either two or no hydrogen bridge. For the investigated molybdates (tungstates) there are in all instances isomorphous tungstates (molybdates). The number and position of the vibrational bands is in good agreement with the observed anion symmetry Td, C3V and Ci, respectively. 
  Reference    Z. Naturforsch. 34b, 145—154 (1979); eingegangen am 23. Oktober 1978 
  Published    1979 
  Keywords    Monomolybdates, Monotungstates, Organic Cations, Properties, X-ray, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0145.pdf 
 Identifier    ZNB-1979-34b-0145 
 Volume    34 
18Author    GerhardG. HoffmannRequires cookie*
 Title    Synthese und Eigenschaften von Brom(methyl)-und Iod(methyl)(organyIthio)gallanen Synthesis and Properties of Bromo(methyl)-and Iodo(methyl)(organylthio)gallanes  
 Abstract    The reaction between dibromo-or diiodo(methyl)gallane and the trimethylsilyl sulphides (CH 3) 3 SiSR (R = CH 3 , C 2 H 5 , A?-C 3 H 7 , I-C 3 H 7 . Ph, CH 2 Ph) have been investigated. Halo(methyl)-(organylthio)gallanes are formed. These compounds and their chloro analogues can also be obtained by the reactions between the dihalo(methyl)gallanes and the corresponding leaddi-(thiolates) in the molar ratios 2:1, or from the halo(dimethyl)gallanes and free thiols. Some physical and chemical properties of the new compounds are given, and the tentative mechanisms of these reactions are discussed. Syntheses of methylgalliumdiiodide and dimethylgalliumhalides via trimethylgallane und galliumtrihalides or methylgalliumdihalides are described. 
  Reference    Z. Naturforsch. 40b, 335—342 (1985); eingegangen am 5. Oktober 1984 
  Published    1985 
  Keywords    Organogallium Derivatives, Trimethylsilyl Sulphides, Leaddi(thiolates), Synthesis, Properties 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0335.pdf 
 Identifier    ZNB-1985-40b-0335 
 Volume    40