CRYSTAL AND MOLECULAR-STRUCTURE OF K[AL2(CH3)6SCN], A COMPOUND WHICH CONTAINS AN S,N-BRIDGING THIOCYANATE LIGAND

被引:24
作者
SHAKIR, R
ZAWOROTKO, MJ
ATWOOD, JL
机构
[1] Department of Chemistry, University of Alabama, University
基金
美国国家科学基金会;
关键词
D O I
10.1016/S0022-328X(00)88059-6
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The crystal structure of K[Al2(CH3)6SCN] has been determined from single-crystal X-ray diffraction data collected by counter methods. The compound crystallizes in the monoclinic space group C2/m with unit cell parameters a 18.579(8), b 8.168(5), c 11.753(6) Å, β 126.80(4)°, and ρ{variant}calc 1.12 g cm-3 for Z = 4. Least-squares refinement gave a final R value of 0.028 for 722 independent observed reflections. The anion exhibits an S,N-bridging thiocyanate. The SCN is linear, and the CNAl angle is 173.4(4)°. The AlN bond is normal, 1.951(5) Å, but the AlS bond length, 2.489(2) Å, implies a rather weak interaction. A distance of ca. 2.35 Å would have been expected. The sulfur atom appears to be using p-orbitals in its bonding scheme, since the AlSC bond angle is 97.3(2)°. © 1979.
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页码:9 / 16
页数:8
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