School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK.
Phys Chem Chem Phys. 2018 Jul 25;20(29):19332-19338. doi: 10.1039/c8cp03432j.
Many complexes of the type BMX, (where B is a Lewis base such as H2, N2, ethyne, ethene, cyclopropane, H2O, H2S, PH3, or NH3, M is a coinage-metal atom Cu, Ag or Au, and X is a halogen atom) have now been characterised in the gas phase through their rotational spectra. It is pointed out that, for a given B, such complexes have angular geometries that are isomorphous with those of their hydrogen- and halogen-bonded counterparts BHX and BXY, respectively. Since the MX are, like the B, HX and XY referred to, closed-shell molecules, the complexes BMX also involve a non-covalent bond. Therefore, the name 'coinage-metal' bond is suggested for the non-covalent interaction in BMX, by analogy with hydrogen and halogen bonds. A generalised definition that covers all non-covalent bonds is also presented.
现在已经通过气相旋转光谱对 BMX 型的许多配合物（其中 B 是路易斯碱，如 H2、N2、乙炔、乙烯、环丙烷、H2O、H2S、PH3 或 NH3，M 是货币金属原子 Cu、Ag 或 Au，X 是卤素原子）进行了表征。文中指出，对于给定的 B，这种配合物具有与它们的氢和卤素键合对应物 BHX 和 BXY 分别同构的角几何形状。由于 MX 与所提到的 B、HX 和 XY 一样，是满壳层分子，所以 BMX 配合物也涉及非共价键。因此，通过与氢键和卤键类比，建议将“货币金属”键这一名称用于 BMX 中的非共价相互作用。文中还提出了一个涵盖所有非共价键的广义定义。
