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Unusual Reactivity of a Cr2P2 Tetrahedral Complex toward Superhydride; Formation of [ ${CpCr(CO)2}$ 2(μ-PH2)x(μ-H)2-x] (x = 1 and 2) and [ ${CpCr(CO)2}$ 2(μ-PH) ${(CpCr)2(μ,η1:η1:η5:η5-P5)}$ ]

Sekar, Perumal and Scheer, Manfred and Voigt, Andreas and Krimse, Reinhard (1999) Unusual Reactivity of a Cr2P2 Tetrahedral Complex toward Superhydride; Formation of [ ${CpCr(CO)2}$ 2(μ-PH2)x(μ-H)2-x] (x = 1 and 2) and [ ${CpCr(CO)2}$ 2(μ-PH) ${(CpCr)2(μ,η1:η1:η5:η5-P5)}$ ]. Organometallics 18 (15), pp. 2833-2837.

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Abstract

Reaction of [ ${CpCr(CO)2}$ 2(μ,η2-P2)] (1) with LiBEt3H in THF at −78 °C affords the new phosphanido complexes [ ${CpCr(CO)2}$ 2(μ-PH2)(μ-H)] (2), [ ${CpCr(CO)2}$ 2(μ-PH2)2] (3), and [ ${CpCr(CO)2}$ 2(μ-PH) ${(CpCr)2(μ,η1:η1:η5:η5-P5)}$ ] (4), which have been characterized by single-crystal X-ray diffraction methods. The structure of 4 reveals a triple-decker sandwich complex with a distorted cyclo-P5 middle deck. The EPR spectrum of the paramagnetic (S‘ = 1/2) complex 4 (T = 130 K) is interpreted with a rhombic-symmetric spin Hamiltonian. A noticeable hyperfine interaction with two 31P nuclei is observed.

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Article

Institutions:

Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Manfred Scheer

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