Reaktion von Kupferarylen mit Imidazol‐2‐ylidenen oder Triphenylphosphan ‐ Bildung von 1:1‐Addukten mit zweifach koordinierten Kupferatomen

Reaction of Copper Aryls with Imidazol‐2‐ylidenes or Triphenylphosphane — Formation of 1:1‐Adducts with Two‐coordinate Copper Atoms The reaction of the copper aryls CuDmp (Dmp = 2, 6‐Mes₂C₆H₃; Mes = 2, 4, 6‐Me₃C₆H₂) and CuMes with the σ‐donors triphenylphosphane and 1, 3‐Di‐iso‐propyl‐4, 5‐dimethylimidazol2‐ylidene affords the adducts DmpCu←PPh₃ ( 1 ), DmpCu←C{N(iPr)CMe}₂ ( 2 ) and MesCu←C{N(iPr)CMe}₂ ( 3 ) in yields between 65 and 84 %. The colorless compounds were characterized by ¹H and ¹³C‐NMR‐spectroscopy, single crystal structure analysis as well as by ³¹P NMR‐spectroscopy ( 1 ), elemental analysis ( 2 ), mass spectrometry ( 2 , 3 ), IR‐spectroscopy ( 2 ) and melting point ( 2 , 3 ). In the solid state structures the two‐coordinate copper atoms possess relatively short Cu—P and Cu—C(carbene) distances of 218, 91(11) ( 1 ), 190, 2(3) ( 2 ) and 191, 1(4) pm ( 3 ).