Coordination chemistry of N-heterocyclic stannylenes: a combined synthetic and Mössbauer spectroscopy study.
Coordination chemistry of N-heterocyclic stannylenes: a combined synthetic and Mössbauer spectroscopy study.
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N-杂环锡烯的配位化学:综合合成和穆斯堡尔光谱研究。
DOI:
10.1021/ic101920x
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发表时间:
2011
影响因子:
4.6
通讯作者:
D. Wass
中科院分区:
文献类型:
--
作者:
S. M. Mansell;R. Herber;I. Nowik;Douglas H Ross;C. A. Russell;D. Wass
The N-heterocyclic stannylenes (NHSns), [(Dipp) N(CH(2))(n)N(Dipp)S n] (Dipp = 2,6- (i)Pr(2)C(6)H(3); n = 2, 1; n = 3, 5) and [((t)Bu) N(CHMe)(2)N((t)Bu)S n] (10) are competent ligands toward a variety of transition metal centers, as seen in the complexes [W(CO)(5)·1] (2), [(OC)(4)Fe(μ-1)(2)Fe(CO)(4)] (3), [(OC)(4)Fe(μ-1)Fe(CO)(4)] (4), [Fe(CO)(4)·5](n) (6, n = 1 or 2), [(OC)(4)Fe(μ-5)Fe(CO)(4)] (7), [Ph(3)PPt(μ-1)(2)PtPPh(3)] (8), [Fe(CO)(4)·10] (11), and [(η(5)-C(5)H(5))(OC)(2)Mn·10] (12). X-ray crystallographic studies show that the NHSns are structurally largely unperturbed binding to the metal, but in contrast to the parent NHCs, NHSns often adopt a bridging position across dinuclear metal units. The balance between terminal and bridging positions for the stannylene is evidently closely balanced as shown by the observation of both monomers and dimers for 6 in the solid state and in solution. (119)Sn and (57)Fe Mössbauer spectroscopy of the complexes shows the tin atoms in such complexes to be consistent with electron deficient Sn(II) centers.