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• W2029217828 abstract "Die potentiell dreizähnigen Phosphane Ph2P[CH2]2PCy[CH2]2PPh2 (L1) und Cy2P[CH2]2PPh-[CH2]2PCy2 (L2) reagieren photoinduziert mit CpMn(CO)3 zu CpMn(CO)nL1 (n = 0, 1) (5, 6) bzw. CpMnL2 (7) und CpMn(CO)μ-L2CpMn(CO)2 (8). CpMn(CO)L1 kann mit seiner freien PPh2-Funktion in Carbonylübergangsmetallverbindungen {M}CO und {M}THF eingefügt werden, wobei die homodinuklearen Komplexe CpMn(CO)μ-L1CpMn(CO)2 (9) und CpMn(CO)μ-L1CpMn(CO)(13CO) (9a) sowie die heterodinuklearen Spezies {M}μ-L1CpMn(CO)n entstehen [n = 1:{M} = Cr/Mo/W(CO)5 (10a, 11a, 12), CpV(CO)3 (13a), CpCo(CO) (14); n = 2:{M} =Cr/Mo(CO)4 (10b, 11b), CpV(CO)2 (13b)]. Ebenfalls Zweikernkomplexe mit verschiedenen Metallzentren erhält man bei der Umsetzung von CpV(CO)2L3 (16) (L3 = Ph2P[CH2]2PPh[CH2]2-PPh2) und CpV(CO)2L4 (21) (L4 = Ph2P[CH2]3PPh[CH2]3PPh2) mit {M}THF; hier konnten die Komplexe {M}μ-L3CpV(CO)2 [{M}  Cr/Mo/W(CO)5 (17a, 18, 19a), η6-C9H11Cr(CO)2 (20)] bzw. Cr(CO)5μ-L4CpV(CO)2 (22) isoliert werden. Die Komplexe mit L4 liegen dabei wahrscheinlich als Konformerengemische (Sessel- und Wannenform der Chelat-6-Ring-Strukturen) vor. Die Struktur der Verbindungen wird anhand ihrer IR-, 31P- und 51V-NMR-Spektren diskutiert und u.a. mit den Daten für die mit p-C6H4(PPh2)2 (L5) gebildeten Zweikernkomplexe {M}2μ-L5 (1–4) [{M} = V(CO)5−, CpV(CO)3, CpMn(CO)2, CpMo(CO)2CH3], deren Darstellung hier ebenfalls beschrieben wird, verglichen. Phosphane-bridged Dinuclear Complexes Containing Carbonyl-η5-cyclopentadienyl Transition Metal Fragments The potentially tridentate phosphanes Ph2P[CH2]2PCy[CH2]2PPh2 (L1) and Cy2P[CH2]2PPh-[CH2]2PCy2 (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 {M}(CO) and {M}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 {M}μ-L1CpMn(CO)n (n = 1:{M}  Cr/Mo/W(CO)5 (10a, 11a, 12), CpV(CO)3 (13a), CpCo(CO) (14); n = 2:{M} =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 = Ph2P[CH2]2-PPh[CH2]2PPh2) and CpV(CO)2L4 (21) (L4 = Ph2P[CH2]3PPh[CH2]3PPh2). Reaction between these compounds and {M}THF afforded {M}μ-L3CpV(CO)2 ({M}  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 mixture of two conformers (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 {M}2μ-L5 (1–4) (L5 = p-C6H4(PPh2)2), the preparation of which is also described in this work." @default.
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• W2029217828 date "1982-10-01" @default.
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• W2029217828 title "Phosphanverbrückte Zweikernkomplexe mit Carbonyl-η5-cyclopentadienyl-Übergangsmetallfragmenten" @default.
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• W2029217828 doi "https://doi.org/10.1002/cber.19821151005" @default.
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