Materials Chemistry Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom.
Department of Chemistry, University of California, Davis, 1 Shields Avenue, Davis, California 95616, United States.
J Am Chem Soc. 2020 Nov 25;142(47):19874-19878. doi: 10.1021/jacs.0c10099. Epub 2020 Nov 10.
The reaction of the copper(I) β-diketiminate copper complex {(Cu(BDI))(μ-CH)} (BDI = ,'-bis(2,4,6-trimethylphenyl)pentane-2,4-diiminate) with the low-valent group 13 metal β-diketiminates M(BDI) (M = Al or Ga; BDI = ,'-bis(2,6-diisopropylphenyl)pentane-2,4-diiminate) in toluene afforded the complexes {(BDI)CuAl(BDI)} and {(BDI)CuGa(BDI)}. These feature unsupported copper-aluminum or copper-gallium bonds with short metal-metal distances, Cu-Al = 2.3010(6) Å and Cu-Ga = 2.2916(5) Å. Density functional theory (DFT) calculations showed that approximately half of the calculated association enthalpies can be attributed to London dispersion forces.
铜（I）β-二酮亚胺铜配合物{(Cu(BDI))(μ-CH)}（BDI= ，'-双（2,4,6-三甲基苯基）戊烷-2,4-二亚胺基）与低价族 13 金属β-二酮亚胺基 M(BDI)（M=Al 或 Ga；BDI= ，'-双（2,6-二异丙基苯基）戊烷-2,4-二亚胺基）在甲苯中反应，得到配合物{(BDI)CuAl(BDI)}和{(BDI)CuGa(BDI)}。这些配合物具有无支撑的铜-铝或铜-镓键，金属-金属距离短，Cu-Al=2.3010(6)Å 和 Cu-Ga=2.2916(5)Å。密度泛函理论（DFT）计算表明，大约一半的计算结合焓可以归因于伦敦色散力。
