Abstract

AbstractNew Copper Complexes Containing Phosphaalkene Ligands. Molecular Structure of [Cu{P(Mes*)C(NMe2)2}2]BF4 (Mes* = 2,4,6‐tBu3C6H2)Reaction of equimolar amounts of the inversely polarized phosphaalkene tBuP=C(NMe2)2 (1a) and copper(I) bromide or copper(I) iodide, respectively, affords complexes [Cu3X3{μ‐P(tBu)C(NMe2)2}3] (2) (X =Br) and (3) (X = I) as the formal result of the cyclotrimerization of a 1:1‐adduct. Treatment of 1a with [Cu(L)Cl] (L = PiPr3; SbiPr3) leads to the formation of compounds [CuCl(L){P(tBu)C(NMe2)2}] (4a) (L = PiPr3) and (4b) (L = SbiPr3), respectively. Reaction of [(MeCN)4Cu]BF4 with two equivalents of PhP=C(NMe2)2 (1b) yields complex [Cu{P(Ph)C(NMe2)2}2]BF4 (5b). Similarly, compounds [Cu{P(Aryl)C(NMe2)2}2]BF4 (5c (Aryl = Mes and 5d (Aryl = Mes*)) are obtained from ArylP=C(NMe2)2 (1c: Aryl = Mes; 1d: Mes*) and [(MeCN)4Cu]BF4 in the presence of SbiPr3. Complexes 2, 3, 4a, 4b, and 5b‐5d are characterized by means of elemental analyses and spectroscopy (1H‐, 13C{1H}‐, 31P{1H}‐NMR). The molecular structure of 5d is determined by X‐ray diffraction analysis.

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