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Übergangsmetallsubstituierte Acylphosphane und Phosphaalkene, XXI. Isophosphaalkine als μ 3 ‐Liganden in Übergangsmetallkomplexen
Author(s) -
Weber Lothar,
Schumann Iris,
Stammler HansGeorg,
Neumann Beate
Publication year - 1994
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19941270804
Subject(s) - chemistry , transition metal , moiety , ligand (biochemistry) , metal carbonyl , stereochemistry , crystal structure , metal , lone pair , cyclooctene , crystallography , medicinal chemistry , molecule , catalysis , biochemistry , receptor , organic chemistry
Transition‐Metal‐Substituted Acylphosphanes and Phosphaalkenes, XXI. — Isophosphaalkynes as μ 3 ‐Ligands in Transition Metal Complexes Reaction of the μ‐isophosphaalkyne complex (η 5 ‐C 5 H 5 ) 2 (CO) 2 (μ‐CO)Fe 2 (μ‐CPMes) (Mes = 2,4,6‐Me 3 C 6 H 2 ) ( 2a ) with [(Z)‐Cyclooctene]Cr(CO) 5 or Fe 2 (CO) 9 gives rise to the μ 3 ‐isophosphaalkyne complexes (η 5 ‐C 5 H 5 ) 2 (CO) 2 (μ‐CO)Fe 2 {μ‐CP[M(CO) n ]Mes} 3a [M(CO) n = Cr(CO) 5 ] and 4a [M(CO) n = Fe(CO) 4 ]. Similarly (η 5 ‐C 5 H 5 ) 2 (CO) 2 (μ‐CO)Fe 2 {μ‐CP[Cr (CO) 5 ]C 6 H 2 (CF 3 ) 3 ‐2,4,6} ( 3d ) is obtained. The metal carbonyl fragments are attached to 2 in a η 1 ‐fashion by the lone‐pair at the phosphorus. In contrast to this the treatment of 2a with (Ph 3 P) 2 Pt(η 2 ‐C 2 H 4 ) affords complex 5a in which 2a serves as an η 3 ‐3e ligand towards the PtPPh 3 moiety. The molecular structures of 3a and 5a are determined by single‐crystal X‐ray analysis.