The reaction of P4 with [Cp′Mo(CO)3]2 (Cp′ = η5-C5H4tBu)—the structure of [Cp′Mo(CO)2<(η3-P4){Cr(CO)5}4(H)>]
作者:Manfred Scheer、Uta Becker、Jörg Magull
DOI:10.1016/s0277-5387(97)00480-4
日期:1998.5
The photochemical reaction of [Cp'Mo(CO)(3)](2) (Cp' = eta(5)-C(5)H(4)tBu) with white phosphorus in the presence of [Cr(CO)(5)thf] leads to the P-n ligand complexes [Cr(CO)(4)[(eta(4)-P-4)Cr(CO)(5)}(4)]] (1), [Cp'Mo(CO)(2)[(eta(3)-P-4)Cr(CO)(5))(4)(H)]] (2) and [Cp'Mo(CO)(2)}(2)[(mu, eta(2)-P-2)Cr(CO)(5)}(2)]] (3) The products were characterized by NMR, IR and partially by X-ray structure analysis. The reaction proceeds via a P-P bond cleavage leading to the bent cyclo-P-4 complex [Cp'Mo(CO)(2)[(eta(3)-P-4)Cr(CO)(5)}(4)(Cp'Mo(CO)(3)}]] (2a), which hydrolysis during the chromatographic work-up to give the more stable-compound 2. Furthermore, a P-3/P-1 fragmentation of 2a occurs to form the phosphido complex intermediate [Cp'(CO)(2)Mo=P-->Cr(CO)(5)]. The latter dimerises resulting in the formation of the tetrahedral compound 3, containing a Mo2P2 moiety. (C) 1998 Elsevier Science Ltd. All rights reserved.
Different Ways of P4 Transformation in the Coordination Sphere of Transition Metals