CRYSTALLINE BINUCLEAR CIS-CHLOROTIN(II) AND TRANS-CHLOROTIN(II) AMIDES [SN(MU-CL)(NR2)]2, THE CIS-1A REVERSIBLE TRANS-1B ISOMERIZATION FOR [NR2 = NCME2(CH2)3CME2], AND THE X-RAY STRUCTURES OF 1A AND OF TRANS-[SN(MU-CL)(N(SIME3)2)]2

被引：60

作者：

CHORLEY, RW

HITCHOCK, PB

JOLLY, BS

LAPPERT, MF

LAWLESS, GA

机构：

来源：

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS | 1991年 / 18期

关键词：

D O I：

10.1039/c39910001302

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Crystalline binuclear chlorotin(II) amides [Sn(mu-Cl)(NR2)]2 have been X-ray characterised as cis-[NR2 = Activated NCMe2(CH2)3CMe2, 1a] and trans-(R = SiMe3, 2b) conformers [Cl-Sn-Cl' = 78.53(4) 1a or 81.33(4)-degrees 2b, Sn-Cl-Sn' 100.91(4) 1a or 98.67(4)-degrees 2b, < Sn-Cl > 2.74 1a or 2.67 angstrom 2b]; a solution of 1 in toluene undergoes rapid cis reversible trans exchange at ambient temperature, but distinct cis-1a and trans-1b forms coexist below 192 K (Sn-119 NMR spectroscopy and line-shape analysis) and evidence is presented for an intramolecular mechanism for this exchange.

引用

页码：1302 / 1303

页数：2

共 10 条

[1]

DIXON DA, 1991, IN PRESS HETEROATOM, V2

[2] SUBVALENT GROUP-4B METAL ALKYLS AND AMIDES .9. GERMANIUM AND TIN ALKENE ANALOGS, THE DIMETALLENES M2R4 [M = GE OR SN, R = CH(SIME3)2] - X-RAY STRUCTURES, MOLECULAR-ORBITAL CALCULATIONS FOR M2H4, AND TRENDS IN THE SERIES M2R'4 [M = C, SI, GE, OR SN - R' = R, PH, C6H2ME3-2,4,6, OR C6H3ET2-2,6] [J].