title: The Mo-Mo Quintuple Bond as a Ligand to Stabilize Transition-Metal Complexes.
abstract: Herein, we report the employment of the Mo-Mo quintuple bonded amidinate complex to stabilize Group 10 metal fragments {(Et3P)2M} (M=Pd, Pt) and give rise to the isolation of the unprecedented δ complexes. X-ray analysis unambiguously revealed short contacts between Pd or Pt and two Mo atoms and a slight elongation of the Mo-Mo quintuple bond in these two compounds. Computational studies show donation of the Mo-Mo quintuple-bond δ electrons to an empty σ orbital on Pd or Pt, and back-donation from a filled Pd or Pt dπ orbital into the Mo-Mo δ* level (LUMO), consistent with the Dewar-Chatt-Duncanson model.
authors.affiliation: Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences and Matters, National Tsing Hua University, 101, Sec. 2, Guang-Fu Road, Hsinchu 300 (Taiwan).
authors.forename: Duan-Yen
authors.initials: DY
authors.lastname: Lu
authors.affiliation: Department of Chemistry, National Chung Hsing University, 250, Kuo-Kuang Road, Taichung 402 (Taiwan).
authors.forename: Peter P-Y
authors.initials: PP
authors.lastname: Chen
authors.affiliation: Department of Chemistry, National Taiwan Normal University, 88, Sec. 4, Ting-Chow Rd, Taipei 116 (Taiwan).
authors.forename: Ting-Shen
authors.initials: TS
authors.lastname: Kuo
authors.affiliation: Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences and Matters, National Tsing Hua University, 101, Sec. 2, Guang-Fu Road, Hsinchu 300 (Taiwan). yictsai@mx.nthu.edu.tw.
authors.forename: Yi-Chou
authors.initials: YC
authors.lastname: Tsai
keywords: Group 10 metals; bonding; molybdenum; δ-bond; δ-complex