CP-ASTERISK-MOH5(PME3) - A CLASSICAL POLYHYDRIDE WITH A PENTAGONAL-BIPYRAMIDAL STRUCTURE AND A LONG T(1) RELAXATION-TIME

被引：13

作者：

ABUGIDEIRI, F ^{[1
]}

KELLAND, MA ^{[1
]}

POLI, R ^{[1
]}

机构：

[1] UNIV MARYLAND,DEPT CHEM & BIOCHEM,COLL PK,MD 20742

来源：

ORGANOMETALLICS | 1993年 / 12卷 / 06期

关键词：

D O I：

10.1021/om00030a060

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Cp*MoH5(PMe3) has been prepared from CP*MoCl2(PMe3) and LiAlH4. The compound is analogous to the previously reported Cp*WH5(PMe3) and CpWH5(PMe3) (Green, M. L. H.;Parkin, G. J. Chem. Soc., Chem. Commun. 1984, 1467. Schrock, R. R.; et al. Organometallics 1986, 5, 1681) for which structural assignments were not made. A single sharp H-1-NMR resonance is observed for the five hydrides down to 183 K, consistent with either a static symmetric structure or a highly fluxional structure, either classical or nonclassical. The measured minimum longitudinal relaxation time, T1, is quite long (780 ms at 400 MHz and 230 K) and consistent with a classical structure based on the pentagonal bipyramid which gives rise to a substantially anisotropic moment of inertia.

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页码：2388 / 2389

页数：2

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