Cp*MoH[sub 5](PMe[sub 3]). A classical polyhydride with a pentagonal-bipyramidal structure and a long T[sub 1] relaxation time

Journal Article · Tue Jun 01 04:00:00 EDT 1993 · Organometallics; (United States)

DOI:https://doi.org/10.1021/om00030a060· OSTI ID:6297766

Abugideiri, F; Kelland, M A; Poli, R ^[1]

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1. Univ. of Maryland, College Park (United States)

Cp*MoH[sub 5](PMe[sub 3]) has been prepared from Cp*MoCl[sub 2](PMe[sub 3]) and LiAlH[sub 4]. The compound is analogous to the previously reported Cp*WH[sub 5](PMe[sub 3]) and CpWH[sub 5](PMe[sub 3]) (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 [sup 1]H-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 longtudinal relaxation time, T[sub 1], 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. 14 refs., 1 tab.

• OSTI ID: 6297766
• Journal Information: Organometallics; (United States), Journal Name: Organometallics; (United States) Vol. 12:6; ISSN ORGND7; ISSN 0276-7333
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400201* -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
COMPLEXES
HYDRIDES
HYDROGEN COMPOUNDS
LITHIUM COMPOUNDS
LITHIUM HYDRIDES
MAGNETIC RESONANCE
MOLECULAR STRUCTURE
MOLYBDENUM COMPLEXES
NUCLEAR MAGNETIC RESONANCE
RESONANCE
SYNTHESIS
TRANSITION ELEMENT COMPLEXES