Synthesis and X‐ray Crystal Structures of Homoleptic Zinc Complexes Containing Monoanionic β‐Ketoiminato and Bis(thiophosphinoyl)methanediide Ligands
Homoleptic zinc complexes of the type L2Zn containing monoanionic β‐ketoiminate and bis(thiophosphinoyl)methanide substituents were synthesized in almost quantitative yield by reaction of HC(CMe)2(O)(N(H)CH2CH2NMe2) and H2C(PPh2=S)2 with zincocene Cp*2Zn at ambient temperature. The reactions proceeded with elimination of Cp*H. [HC(CMe)2(O)(NCH2CH2NMe2)]2Zn (1) and [HC(PPh2=S)2]2Zn (2) were characterized by NMR (1H, 13C, 31P) and IR spectroscopy as well as elemental analysis and single crystal X‐ray diffraction. 1 and 2 were also obtained in reactions of dizincocene, Cp*2Zn2, with two equivalents of the ligands. The reactions proceeded with disproportionation of initially formed monovalent dizinc complexes.
Dedicated to Prof. R. Hoppe on the Occasion of his 90th Birthday.