Synthesis and spectroscopic characterization of hexakis(carbonyl)iron(II) undecafluorodiantimonate(V), [Fe(CO)(6)][Sb2F11](2)

被引:33
作者
Bley, B
Willner, H
Aubke, F
机构
[1] UNIV HANNOVER,INST ANORGAN CHEM,D-30167 HANNOVER,GERMANY
[2] UNIV BRITISH COLUMBIA,DEPT CHEM,VANCOUVER,BC V6T 1Z1,CANADA
关键词
D O I
10.1021/ic9608105
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Oxidative carbonylation of Fe(CO)(5) in liquid SbF5 and a CO atmosphere, with either AsF5 or Cl-2 as external oxidizing agents, produces [Fe(CO)(6)][Sb2F11](2) in very high yield. The resulting off-white solid material is thermally stable (above 200 degrees C). The homoleptic carbonyl cation [Fe(CO)(6)](2+), the first of its type formed by a 3d-metal, is isostructural with [Ru(CO)(6)](2+) and [Os(CO)(6)](2+) which are obtained by reductive carbonylation of M(SO3F)(3), M=Ru or Os. The stretching force constant of 19.82x10(2) N m(-1) and <(nu)over bar (CO) (av)>, of 2215.5 cm(-1) suggest significantly reduced pi-back-bonding. The single line Fe-57 Mossbauer spectrum at delta=-0.001(6) mm s(-1) relative to alpha-Fe is consistent with a regular octahedral structure and a (1)A(1g) groundstate for [Fe(CO)(6)](2+). The possible existence of [Fe(CO)(6)](3+) formed by oxidation with Cl-2 is discussed.
引用
收藏
页码:158 / 160
页数:3
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