84086-29-3Relevant academic research and scientific papers
Phosphane-bridged Dinuclear Complexes Containing Carbonyl-η5-cyclopentadienyl Transition Metal Fragments
Kececi, Ahmet,Rehder, Dieter,Roose, Wolfgang,Talay, Ridvan
, p. 3257 - 3270 (2007/10/02)
The potentially tridentate phosphanes Ph2P2PCy2PPh2 (L1) and Cy2P2PPh2PCy2 (L2) react photochemically with CpMn(CO)3 to form the mono-metallic mono-ligate complexes CpMn(CO)nL1 (n = 1, 0) (5, 6) and CpMnL2 (7), and the dimetallic mono-ligate CpMn(CO)μ-L2CpMn(CO)2 (8).With its uncoordinated PPh2 function, CpMn(CO)L1 can be coupled to transition metal carbonyls CO and THF to form the homodinuclear complexes CpMn(CO)μ-L1CpMn(CO)2 (9) and CpMn(CO)μ-L1CpMn(CO)(13CO) (9a), and the heterodinuclear species μ-L1CpMn(CO)n (n = 1: = Cr/Mo/W(CO)5 (10a, 11a, 12), CpV(CO)3 (13a), CpCo(CO) (14); n = 2: = Cr/Mo(CO)4 (10b, 11b) CpV(CO)2 (13b)).Dinuclear complexes with various metal centra are also obtained with CpV(CO)2L3 (16) ( L3 = Ph2P2PPh2PPH2) and CpV(CO)2L4 (21) (L4 = Ph2P3PPh3PPh2).Reaction between these compounds and THF afforded μ - L3CpV(CO)2 ( = Cr/Mo/W(CO)5 (17a, 18, 19a), η6-C9H11Cr(CO)2 (20)) and Cr(CO)5μ - L4CpV(CO)2 (22), respectively, the latter presumably in an isomeric structure of two conformeres (chair form and boat form).Structural characteristics are discussed on the basis of IR, 31P, and 51V NMR parameters and compared, inter alias, with the data obtained for the homo-dinuclear complexes 2μ - L5 ( 1 - 4) (L5 = p-C6H4(PPh2)2), the preparation of which is also described in this work.
