REACTIONS OF DINUCLEAR AND POLYNUCLEAR COMPLEXES .12. SYNTHESIS AND THERMAL-DECOMPOSITION REACTIONS OF TETRANUCLEAR CLUSTERS [CO4CP2(CO)5-NLN(RC2R')] (L=PPH2H N=0, 1 OR 2) (R=R'=CF3, C6F5, C6H5 OR ME R=H, R'=CF3)

Citation
P. Quenech et al., REACTIONS OF DINUCLEAR AND POLYNUCLEAR COMPLEXES .12. SYNTHESIS AND THERMAL-DECOMPOSITION REACTIONS OF TETRANUCLEAR CLUSTERS [CO4CP2(CO)5-NLN(RC2R')] (L=PPH2H N=0, 1 OR 2) (R=R'=CF3, C6F5, C6H5 OR ME R=H, R'=CF3), Journal of organometallic chemistry, 479(1-2), 1994, pp. 93-102
Citations number
29
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear
ISSN journal
0022328X
Volume
479
Issue
1-2
Year of publication
1994
Pages
93 - 102
Database
ISI
SICI code
0022-328X(1994)479:1-2<93:RODAPC>2.0.ZU;2-J
Abstract
The dinuclear complexes [(CO)3Co(mu-RC2R')Co(CO)3] (R = R' = CF3, C6F5 , C6H5 or Me; R = H, R' = CF3) react with [CpCo(CO)2] in refluxing oct ane to afford tetranuclear complexes [Co4Cp2(CO)4(mu-CO)(mu-RC2R')] (2 ) in good yield; these tetracobalt clusters have been characterised by spectroscopic methods. Thermolysis of [Co4CP2(CO)5(RC2R')] (2) and of the related substituted complexes [Co4CP2(CO)4-n(mu-CO)(PPh2H)n(CF3C2 CF3)] results mainly in the loss of carbonyl and the formation of trin uclear clusters [Co3Cp3(mu3-CO)(mu3-eta2-RC2R')] (3) and [Co3Cp2(CO)2( mu-PPh2)(mu3-eta2-CF3C2CF3)] (7), respectively. The conversion of clus ters 3 and 7 into dialkylidyne complexes has been examined. The spectr oscopic data for the new complexes are discussed and mechanisms propos ed to account for their formation.