摘要:

AbstractTriphenyltinN‐phthaloylglycinate crystallizes from ethanol as a bridged, cyclic hexamer (rhombohedral R3space group,a= 19.928(3) Å, α = 116.47(2)0;Z= 6) and triphenyltinN‐phthaloylleucinate as a monomeric molecule (orthorhombicPbcaspace group,a= 18.032(6),b= 26.992(7),c= 11.705(4) Å

ISSN:1042-7163    

DOI:10.1002/hc.520010602

出版商:VCH Publishers, Inc.    

年代:1990

数据来源: WILEY

摘要:

AbstractA solvate complex of (−)‐1‐menthoxygermatrane with chloroform (1) was obtained by reaction of (−)‐menthoxytriethylstannane with 1‐bromogermatrane in chloroform. The crystal and molecular structure of1was established by X

ISSN:1042-7163    

DOI:10.1002/hc.520010603

出版商:VCH Publishers, Inc.    

年代:1990

数据来源: WILEY

摘要:

AbstractThe title compounds were obtained by the reaction of 1‐aryl‐3‐trimethylsilyl‐1,3‐diaza‐2‐thiaallenes with dichloromonosulfane or 1‐aryl‐4‐(1‐phtalimidyl)‐1,3‐diaza‐2,4‐dithia‐1,2‐butadienes in the presence of CsF. The latter route also afforded nonsymmetric derivatives. In contrast, the reaction ofN,N,N′,N′‐tetrakis(trimethylsilyl)diaminosulfane withS,S‐dichloro‐N‐aryliminosulfuranes (1:2) led to 1,3‐bis(aryl)‐1,3‐diaza‐2‐thiaallenes and cyclotetra(azathiene). As shown by the X‐ray structure analysis, the molecule of the title compound with Ar = Ph is planar, with configuration of the azathiene chain being similar to that of poly(azathiene) (SN)x. The MNDO calculations indicate that most of the π‐MOs of this compound, including the frontier ones, are delocalized throughout the whole molecule. The data obtained confirm the possibility of creating molecular wire for molecular electronic devices on the basis of extended acyclic azathienes. An attempt to synthesize more extended compounds than the title ones

ISSN:1042-7163    

DOI:10.1002/hc.520010604

出版商:VCH Publishers, Inc.    

年代:1990

数据来源: WILEY

摘要:

Abstract1,1‐Difluorodecamethyl‐ and 1,1,4,4‐tetrafluorooctamethylcyclohexasilane were synthesized by the reaction of LiF with the corresponding trifluoromethanesulfonic derivatives and were characterized by spectroscopic methods, mainly by modern NMR techniques. The stability of the fluorinated cyclosilanes decreases with an increase of fluorine substituents. This seems to be the reason for the instability of perfluorinated cyclosi

ISSN:1042-7163    

DOI:10.1002/hc.520010605

出版商:VCH Publishers, Inc.    

年代:1990

数据来源: WILEY

摘要:

AbstractThe reaction of B10H12(SMe2)2(1) with HN3yieldsarachno‐B10H12(N3)(NH2) (2), a product with a μ‐NH2group. Compound2can be hydrolysed to give the knownarachno‐B9H13(NH3) (3).nido‐NB9H11(N3) (4) is formed from2by a deprotonation/protonation sequence. The azaboranenido‐NB10H13(5) is a product of the thermolysis of2. The structures of2–5are elucidated by 2‐D COSY11B–11B NMR spectra; the structure of2is also elucidated by an X‐ray

ISSN:1042-7163    

DOI:10.1002/hc.520010606

出版商:VCH Publishers, Inc.    

年代:1990

数据来源: WILEY

摘要:

AbstractSelenium has been found to be an excellent catalyst for the reductive debromination of some organic bromides with carbon monoxide and water:vic‐dibromoalkanes and α‐halo ketones can be reduced to the corresponding alkenes and ketones respectively in moderate to high yi

ISSN:1042-7163    

DOI:10.1002/hc.520010607

出版商:VCH Publishers, Inc.    

年代:1990

数据来源: WILEY

摘要:

AbstractThe synthesis and characterization of (Me3Si)2AsCH2RCH2As(SiMe3)2[R = CH2(1), SiMe2(2)] is described. Compound1reacts with four equivalents of Ph2GaCl to produce (3), whose structure was deduced by use of1H and13C{1H} NMR spectroscopy.

ISSN:1042-7163    

DOI:10.1002/hc.520010608

出版商:VCH Publishers, Inc.    

年代:1990

数据来源: WILEY

摘要:

AbstractThe reaction of appropriate amounts of BH3with diazadiboretidines (RBNtBu)2(1a–e; R = Et, Pr, Bu,tBu,tBu(Me3Si)N) transforms them into cyclic diazapentaboranes either of the type [RB(H2)BRNtBuBHNtBu] (2a–c), of the type [HB(H2)BRNtBuBHNtBu] (3a–d), or of the type [HB(H2)BHNtBuBHNtBu] (4), or into an acyclic product RBHNtBuBHNtBuBHR (2e). The structure of3cis characterized by a planar N2B3rin

ISSN:1042-7163    

DOI:10.1002/hc.520010609

出版商:VCH Publishers, Inc.    

年代:1990

数据来源: WILEY

摘要:

AbstractThe reaction ofN,N,O‐tris(trimethylsilyl)‐o‐aminophenol with two equivalents of phosphinic chloride yielded dimeric 2,2‐disubstituted 1,3,2λ5‐benzoxazaphospholes and trimethylsilyl phosphinate. The chlorides having the bulk substituents (o‐chlorophenyl or tert‐butyl) at phosphorus or containing PN and PO bonds (instead of a PC bond) either didn't react at all or reacted to retain the phosphoryl group. Being stable in solution at 20°C, the individual diastereoisomers of dimeric 1,3,2‐benzoxazaphospholes were converted upon warming to an equilibrium mixture of isomers. When reacted with another dimer each gave a mixed dimeric compound having two different phosphoru

ISSN:1042-7163    

DOI:10.1002/hc.520010610

出版商:VCH Publishers, Inc.    

年代:1990

数据来源: WILEY

摘要:

AbstractDiphenyl diselenide and diphenyl ditelluride were reduced by samarium (II) diiodide in tetrahydrofuran‐hexamethylphosphoric triamide to produce samarium phenylselenolate and samarium phenyltellurolate, respectively. This new selenolate or tellurolate anion species reacted smoothly with alkyl, allyl, and benzyl halides to give alkyl‐, allyl‐, and benzylphenyl selenides or tellurides in good yields under mild and neutral conditions. The samarium selenolate reacted with α‐halo ketones to give the corresponding α‐phenylseleno ketones. 1,4‐Addition with α,β‐enones proceeded to give 3‐phenylseleno ketones in moderate yields. Isolation of phenylselenotributyltin or phenylseleno‐trimethylsilane by transmetalation with tributyltin iodide or trimethylchlorosilane, respectively, suggested the presence of the samari

ISSN:1042-7163    

DOI:10.1002/hc.520010611

出版商:VCH Publishers, Inc.    

年代:1990

数据来源: WILEY