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1992[X]
81Author    K. Urt, O. Klepp, Karl PragerRequires cookie*
 Title    N a2H gS2 und K2H gS2, zwei Thiomercurate mit isolierten Anionen N a2HgS2 and K 2HgS2, Two Thiomercurates with Discrete Anions  
 Abstract    Thiom ercurate(II), Crystal Structure N a2HgS2 and K 2HgS2 were obtained as colourless, tabular crystals by reacting the alkali sul­ fides Na-,S and K 2S with red HgS at 970 K. Both com pounds are orthorhom bic: Na-,HgS-,, oP40, s.g. Pbca with a = 18.24(2)Ä, b = 7.494(5)Ä, c = 7.237(5)Ä, Z = 8; K 2HgS2, oP2'0, s.g. Pbcm a = 10.697(6)Ä, b = 7.958(8)Ä, c = 7.272(9) A, Z = 4. Their crystal structures were determined from four circle diffractometer data and refined anisotropically to conventional /?-factors o f 0.056 (N a2HgS2) and 0.062 (K 2HgS2) for 945 and 485 reflections with F 02 > 3er(F02X resp. The crystal structures represent new structure types. They are closely related with each other and can be derived from hcp-arrays of the chalcogen-atoms. Characteristic feature is the formation of discrete, almost linear average HgS-bond lengths of 2.31 Ä. 
  Reference    Z. Naturforsch. 47b, 491—496 (1992); eingegangen am 9. September 1991 
  Published    1992 
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 Identifier    ZNB-1992-47b-0491 
 Volume    47 
82Author    F. Bitterer, D. J. Brauer, F. D. Örrenbach, O. StelzerRequires cookie*
 Title    Cyclometallierung und Entalkylierung eines zweizähnigen Chlorphosphans mit Fe2(CO)9  
 Abstract    B identate C hlorop ho sp h in es, C yclo m etallatio n , P h o sp h id o Com plexes, Phosphidoalkylphosp h in e Bridge, O lefin E lim in atio n T reatm ent o f the bifu n ctio n al ch lo ro p h o sp h in e R 2P -C H 2-P R C 1 (R = /Bu) w ith diiron-enneacarbonyl affords the binuclear complex F e2(C O)6Lü2,^3-P (/B u)-C H 2-P (rB u)-C M e 2-C H 2] (2) by oxidative addition reaction and m etallation o f one o f the ?Bu groups within the fBu2P -C H 2 unit. A t elevated tem peratures 2 elim inates isobutene, the phosphido complex Fe2(CO)6[(//2-P(fBu))2C H 2] (3) being form ed. The crystal structure o f 2 (space group P 1 with a = 8.663(3), b = 10.849(4), c = 14.618(6) Ä, a = 103.02(2), ß = 96.32(3), y = 112.77(2)°, Z = 2) reveals a binuclear com plex w ith a P (/B u) -C H 2-P (/B u) -C M e 2-C H 2 ligand b ackbone spanning the F e -F e b o n d via a p h o sp h id o Gu2-P (/B u)(C H 2)) an d a p h osphinoalkyl (//2-P (/B u)-C M e 2-C H 2) bridge. A strain ed , four-m em bered P 2C F e ring is form ed th ro u g h co o rd in atio n o f the P -C -P d o n o r set to Fe(2). 
  Reference    Z. Naturforsch. 47b, 497 (1992); eingegangen am 31. Juli 1991 
  Published    1992 
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 Identifier    ZNB-1992-47b-0497 
 Volume    47 
83Author    M. Ustafa Ate, HansJoachim Breunig, KlausH. Ebert, Rose Kaller, M. Artin Dräger, Ulrich BehrensRequires cookie*
 Title    Strukturen von Tetramesityldistiban (Mes4Sb2) und Trimesitylstiban (M es3Sb) Structures of Tetramesityldistibane (Mes4Sb2) and Trimesitylstibane (Mes3Sb)  
 Abstract    The crystal structure of tetramesityldistibane consists of isolated Mes4Sb2 molecules in the trans conformation (average distance S b -C 219 pm, distance S b -S b 284.9(1) pm, angles SbC2 9 7 °-100°, Sb2C 92°-109°). In the structure o f trimesitylstibane there are stacks of isolated tri­ gonal pyramidal Mes,Sb molecules (average distance S b -C 218 pm, angles SbC-, 104 -106°). 
  Reference    Z. Naturforsch. 47b, 503—508 (1992); eingegangen am 18. O ktober 1991 
  Published    1992 
  Keywords    Tetramesityldistibane, Trimesitylstibane, X-Ray 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-0503.pdf 
 Identifier    ZNB-1992-47b-0503 
 Volume    47 
84Author    Burkhard Niemer, TorstenW. Eidmann, W. Olfgang, BeckRequires cookie*
 Title    Kohlenwasserstoffverbrückte Metallkomplexe, XXIV [1] Pentacarbonylrhenio-substituierteThiophen-, Cyclohexadienyl-und Benzol-Komplexe von Mangan, Rhenium und Eisen Hydrocarbon Bridged Complexes, XXIV [1] Pentacarbonylrhenio Substituted Thiophene, Cyclohexadienyl and Benzene Complexes of M anganese, Rhenium and Iron  
 Abstract    The addition o f pentacarbonylrhenate to [(OC)3M n(thiophene)]+, [(OC)3M (^6-C6H 4R2)]+ (M = Mn, Re; R = H, Me, Cl) yields the er,7r-hydrocarbon bridged complexes (OC)3MnGu-774:/71-C4H 4S)Re(CO)5 and (OC)3M(Ju-^6:7 1-C6H 4R 2)Re(CO)5, respectively. The latter complexes have also been obtained from (OC)5M F B F 3 (M = Mn, Re) and C6H 5Re(CO)5. The fluxional behaviour o f the cyclohexadienyl bridged complexes is probably due to a 1,2-shift of the Re(CO)5 group. The reaction o f [Re(CO)5]-with [(/;5-C5H 5)Fe(^6-/?-C6H 4(R)Cl)]+ (R = H, Me, Cl) proceeds with substitution o f chlorine to give the heterobimetallic compounds [(75-C5H 5)Fe[^-/76^ 1-C6H 4(R)]Re(CO)5]+. 
  Reference    Z. Naturforsch. 47b, 509—516 (1992); eingegangen am 8. N ovember 1991 
  Published    1992 
  Keywords    Nucleophilic Addition o f Pentacarbonylrhenate, er, 7r-Thiophene, Cyclohexadienyl, Benzene Bridged Metal Complexes, Manganese Complexes, Rhenium Complexes 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-0509.pdf 
 Identifier    ZNB-1992-47b-0509 
 Volume    47 
85Author    ThomasG. Meyer, PeterG. Jones, Reinhard SchmutzlerRequires cookie*
 Title    Preparation of 1,3,5-Trimethyl-4,6-dioxo-1,3,5,2x3-triazaphosphinanes; Single Crystal X-Ray Diffraction Study o f a Platinum(II)-Complex  
 Abstract    1,3,5-Trimethylbiuret, 1,3,5-Trimethyl-4,6-dioxo-1,3,5,2/.3-triazaphosphinane, X-Ray, Staudinger Reaction A new synthesis for 2-chloro-l,3,5-trim ethyl-4,6-dioxo-l,3,5,2A3-triazaphosphinane (1) is described. Chlorine-fluorine exchange in 1 by means o f sodium fluoride in acetonitrile in the presence of catalytic am ounts of a crown ether furnished 2-fluoro-l,3,5-trimethyl-4,6-dioxo-l,3,5,2A3-triazaphosphinane (2). The synthesis of the bromine and iodine analogues, 3 and 4, by metathesis of 1 with the appropriate trimethylsilyl halides, M e3SiBr and Me3SiI, respective­ ly, is also described. The syntheses of an iron(0)tetracarbonyl complex (5) and of a dichloro-platinum(II) complex (6) are reported. A single crystal X-ray diffraction study was conducted on 6. [P2,/c, a = 1161.3(3), b = 1423.2(3), c = 1247.7(3) pm, ß = 109.42(2)°, R = 0.028], There are deviations from ideal square planar geometry at platinum . The heterocycles display a flat­ tened boat conformation. A Staudinger reaction of 1 with M e3SiN3 led to the formation of a substituted cyclotriphosphazene. 
  Reference    Z. Naturforsch. 47b, 517—525 (1992); eingegangen am 9. September 1991 
  Published    1992 
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 Identifier    ZNB-1992-47b-0517 
 Volume    47 
86Author    ThomasD. Smith, PeterG. Jones, Reinhard SchmutzlerRequires cookie*
 Title    The Role of Elimination Processes in the Reaction of Substituted Ureas and Thioureas with Chlorides of Mono-and Bifunctional Acids  
  Reference    Z. Naturforsch. 47b, 526—532 (1992); received August 29 1991 
  Published    1992 
  Keywords    Reactive Halides, Substituted Ureas, Elimination Reactions, X-Ray 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-0526.pdf 
 Identifier    ZNB-1992-47b-0526 
 Volume    47 
87Author    Z. NaturforschRequires cookie*
 Title    Elektronentransfer und Ionenpaar-Bildung, 28 [1, 2] ESR/ENDOR-Untersuchungen an Radikalanionen und Kontakt-Ionenpaaren der Naturstoff-Chinone Mitomycin C, Streptonigrin, Entobex® und 10,11-Dioxobrucin  
 Abstract    Reduction of naturally occurring para-and orf/zo-benzoquinone derivatives M to their re­ spective radical anions M e can be accomplished under largely aprotic conditions either by cautious low-temperature reaction in T H F containing an excess of (2.2.2) cryptand at a potas­ sium m irror or by using the "mild" single electron transfer reagent tetrabutylam m onium bo-ranate R4N®BH4e in D M F. On addition of soluble alkali tetraphenylborates Me®[B(C6H 5)4]e , their hitherto unknown radical ion pairs [M e Me®]' and/or triple ion radical cations [Me®M'®Me®]'® form, which might be o f biological relevance in molecular carrier and "turn off -turn on" switch processes. On addition of metal perchlorates Me®"(ClO40)" with m ulti­ ply charged counter cations Me®" the respective param agnetic species [M'e Me®"]'(',_I)® result. Assuming exclusive one-electron transfer reductions w ithout any redox fragm entation reac­ tions, ESR, EN D O R and G EN ER A L TRIPLE spectra are presented and discussed for the following radical anions and radical ion pairs: mitomycin C (M ® and [M'e M et®] (jc_1)® with Me® = Li®, Na®), streptonigrine (M 'e and [M ^Li,.®]^-1)®), Entobex® (M 'e and [M'e Me®"]'("_I)® with Me®" = Li®, Na®, Cd®®, (H 5C6)2T1®) as well as brucinequinone ([M'e Me®"]'("_1)® with Me®" = Li®, Cd®®, Pb®®, La®®®). 
  Reference    Z. Naturforsch. 47b, 533—546 (1992); eingegangen am 18. Juli 1991 
  Published    1992 
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 Identifier    ZNB-1992-47b-0533 
 Volume    47 
88Author    Zeynel Kilig, Edwin Weber, NeclaG. Ündüza, Emine Kili£a, Hasan Nazira, Tuncer Hökelekc, Mehmet ToydRequires cookie*
 Title    Preparation and Characterization of New Amino-Substituted Crowns and Podands  
  Reference    Z. Naturforsch. 47b, 547 (1992) 
  Published    1992 
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 Identifier    ZNB-1992-47b-0547 
 Volume    47 
89Author    Abdel-Fattah ShihadaRequires cookie*
 Title    Synthesis and Characterization of Ph3S n 0 2PX2 (X = Cl, Br) and Et2S n (0 2PCl2)2  
  Reference    Z. Naturforsch. 47b, 553 (1992) 
  Published    1992 
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 Identifier    ZNB-1992-47b-0553 
 Volume    47 
90Author    Shinzi Kato, Kazum Asa Ibi, Hideki Kageyama, Hideharu Ishihara, ToshiakiM. UraiRequires cookie*
 Title    Triorganogermanium Selenocarboxylates: Synthesis and Reactions  
 Abstract    D epartm en t o f C hem istry, F acu lty o f Engineering, G ifu U n iversity, 1-1 Y a n a g id o , G ifu 501-11, Japan 
  Reference    Z. Naturforsch. 47b, 558 (1992) 
  Published    1992 
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 Identifier    ZNB-1992-47b-0558 
 Volume    47 
91Author    Hans Schuhmacher, Herbert MeierRequires cookie*
 Title    Synthese von Thiacycloocteno-l,2,3-selenadiazolen Synthesis of Thiacycloocteno-l,2,3-selenadiazoles  
 Abstract    für O rganische C hem ie der U n iversität M ainz, J.-J.-B echer-W eg 1 8 -2 2 , D -W -6500 M ainz 
  Reference    Z. Naturforsch. 47b, 563 (1992) 
  Published    1992 
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 Identifier    ZNB-1992-47b-0563 
 Volume    47 
92Author    G.Erhard Koßmehl, Cornelia PithartRequires cookie*
 Title    Liquid Crystalline Compounds in the Thiophene Series, Part 5 Synthesis and Characterization of Liquid Crystalline Polysiloxanes with Styrylthiophene Units  
 Abstract    Z. N atu rforsch . 47b, 5 6 7 -5 7 1 (1992); received A u gu st 30, 1991 Side C hain L iquid C rystalline P olym ers, Liquid C rystalline T h iop h en e Siloxanes, T h iop h en e D erivatives, Styrylthiophene D erivatives, 4-(5-A lk yl-2-th ien ylvin yl)b en zoic A cid D erivatives T he syn thesis and characterization o f p olysiloxan es con tain in g styrylthiophene units as side groups are described. P olysiloxan es containing spacers w ith six or eleven m eth ylen e units e x ­ hibit sm ectic phases. If the spacer contains only three m ethylene units, the p oly silo x a n es exh ib ­ it n o liquid crystalline behaviour. 
  Reference    Z. Naturforsch. 47b, 567 (1992) 
  Published    1992 
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 Identifier    ZNB-1992-47b-0567 
 Volume    47 
93Author    Requires cookie*
 Title    Studies with Polyfunctionally Substituted Heterocycles: Synthesis of New Pyridines, Naphtho[l,2-b]pyrans, Pyrazolo[3,4-b]pyridines and Pyrazolo[l,5-a)pyrimidines  
  Reference    Z. Naturforsch. 47b, 572 (1992) 
  Published    1992 
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 Identifier    ZNB-1992-47b-0572 
 Volume    47 
94Author    Frederick Kurzer, ZakirK. ApadiaRequires cookie*
 Title    Bicyclo[2.2.2]octane-2-spirocyclohexanes, Part 4 [1] Birch Reduction of Spirodiisophor-6-ones  
 Abstract    R oyal Free H osp ital School o f M ed icine, U niversity o f L o n d o n , L o n d o n N W 3, E ngland 
  Reference    Z. Naturforsch. 47b, 579 (1992) 
  Published    1992 
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 Identifier    ZNB-1992-47b-0579 
 Volume    47 
95Author    W. Olfgang Kowollik, Wolfgang VoelterRequires cookie*
 Title    Synthese und N M R -spektroskopische Eigenschaften von Benzyl-2,3-anhydro- 4-desoxy-4-[N|-pyridinium -pyranosiden Synthesis and N M R Spectroscopic Properties o f Several Benzyl 2,3-Anhydro- 4-deoxy-4-[N]-pyridinium Pyranosides  
 Abstract    A b teilu n g für P hysikalische B iochem ie des P h ysiologisch -ch em isch en Instituts der U n iversität T üb in gen , H oppe-Seyler-Straße 4, D -W -7 4 0 0 T üb ingen 
  Reference    Z. Naturforsch. 47b, 589 (1992) 
  Published    1992 
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 Identifier    ZNB-1992-47b-0589_n 
 Volume    47 
96Author    W. Erner Fuß, M. Artin RüheRequires cookie*
 Title    Chlor(trifluorphosphan)gold(I), eine einfache flüchtige Goldverbindung Chloro(trifluorophosphane)gold(I), a Simple Volatile Gold Com pound  
  Reference    Z. Naturforsch. 47b, 591 (1992) 
  Published    1992 
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 Identifier    ZNB-1992-47b-0591_n 
 Volume    47 
97Author    R. Olf Minkwitz, AndreasK. Ornath, Hans PreutRequires cookie*
 Title    Über die Kristallstruktur von /?-SCl3+SbCl6~ und interionischen Wechselwirkungen in SC l3+-Salzen [1] The Crystal Structure o f /?-SCl3+SbCl6~ and Interionic Interactions in SC13+ Salts [1]  
 Abstract    U n iversität D ortm un d, F achbereich C hem ie, A n organ isch e C hem ie, Postfach 5 0 0 5 0 0 , D -W -4 6 0 0 D ortm u n d 50 Z. N atu rforsch. 47b, 5 9 4 -5 9 6 (1992); eingegangen am 13. N o v em b er 1991 C h lorosu lfon ium Salts, C rystal Structure, Interionic Interactions C h lorosu lfon ium h exach loroan tim on ate crys­ tallizes in the m on oclin ic space group C 2/m w ith a = 1405.5(3) pm , b = 1055.1(2) pm , c = 882.2(2) pm , ß = 110.05(3)° at 169 K w ith 4 form ula units per unit cell. A distorted octahedral c o ord in ation around sulphur is form ed by three S -C l bon ds and three interionic sulphur chlorine contacts. The interionic interaction s in SC13+ salts o f know n crystal structures are discussed. 
  Reference    Z. Naturforsch. 47b, 594 (1992) 
  Published    1992 
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 Identifier    ZNB-1992-47b-0594_n 
 Volume    47 
98Author    W. Olfgang Walek3, Christine Fieseler, Peter Schneiderb, G. Erhard, W. Fischer6Requires cookie*
 Title    Trennung und biologische Wirksamkeit der Enantiomeren eines chiralen Thiadiazolylsulfoxides Separation and Biological Activity of the Enantiomers of a Chiral Thiadiazolyl Sulfoxide  
 Abstract    a C h em ie A G B itterfeld-W olfen, Z örbiger Straße, D -0 -4 4 0 0 Bitterfeld b F orsch ungsstelle für ch em isch e T oxik ologie, P erm oserstraße 15, D -0 -7 0 5 0 Leipzig Z. N atu rforsch. 47b, 5 9 7 -5 9 9 (1992); ein gegan gen am 23. Septem ber 1991 
  Reference    Z. Naturforsch. 47b, 597 (1992) 
  Published    1992 
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 Identifier    ZNB-1992-47b-0597_n 
 Volume    47 
99Author    PeterG. Jones, Carsten ThöneRequires cookie*
 Title    Gold Complexes with Selenium Ligands, V [1] Synthesis and Crystal Structure of [(Ph3PAu)2Se(p-C6F4Cl)]+SbF6  
 Abstract    Institut für A n organ isch e und A n alytische C hem ie der T ech nischen U n iversität, H agen ring 30, D -W -3 3 0 0 B raunschw eig Z. N atu rforsch . 47b, 6 0 0 -6 0 2 (1992); received O ctob er 7, 1991 G o ld C om p lexes, X -R a y , Selenium Ligands T he binuclear com p lex [(Ph3P A u)2Se(/?-C6F 4C l)]+S b F 6_ w as prepared from P hjP A uC l and (/>-C6F 4C l)2Se2 in the pres­ ence o f A g S b F 6. The crystal structure sh ow s a short intram olecu lar gold -g o ld interaction , w hich leads to an extrem e distortion in the coord in ation geom etry at selenium . 
  Reference    Z. Naturforsch. 47b, 600 (1992) 
  Published    1992 
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 Identifier    ZNB-1992-47b-0600_n 
 Volume    47 
100Author    Yuniu Bai, HerbertW. Roesky, Hans-G Eorg, Schmidt, M. Athias NoltemeyerRequires cookie*
 Title    Reaktionen von Titanocentrihalogeniden mit Tris(trimethylstannyl)amin Reactions of Titanocentrihalides with Tris(trimethylstannyl)amine  
 Abstract    A n organ isch e C h em ie der U n iversität G ö ttin gen , T am m annstraße 4, D -W -3400 G öttin gen Herrn Prof. Dr. Wolfgang Beck zum 60. G eburtstag gew idmet Z. N atu rforsch. 47b, 6 0 3 -6 0 8 (1992); ein gegan gen am 9. Septem ber 1991 C leavage o f T in -N itrogen B ond s, T itan ocen h alid es A new route for the preparation o f (M e 3G e)3N (2a) using M e3G eC l and (M e3Sn)3N is d e­ scribed. C p 'T iC l3 (Cp' = M e 5C 5 (la) and M e3S iC 5H4 (lb)) reacts with (M e3Sn)3N to yield (C p 'T iC lN S n M e3)2 (3a) and (3b). (M e 5C 5T iF N S n M e 3)2 (3c) is form ed w hen M e5C 5T iF 3 is treated w ith (M e 3Sn)3N . The X -ray structures o f 3a and (M e3SiC 5H 4T iC lN /B u)2 (5) are report­ ed. 3a and 5 con sist in the solid state o f four-m em b ered T i2N 2 rings with the substituents in different p osition s. 
  Reference    Z. Naturforsch. 47b, 603 (1992) 
  Published    1992 
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 Identifier    ZNB-1992-47b-0603 
 Volume    47 
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