The proposed identification of molecules with potential metal to carbon quadruple bonds, in which the metal exhibits trigonal bipyramidal coordination rather than the tetrahedral modes which have been proposed in the literature[cite]10.1039/d0cp03436c[/cite],[cite]10.1039/d1cp00598g[/cite],[cite]10.1021/acs.jpclett.9b03484[/cite] leads on to asking whether simple trigonal coordination at the metal can also sustain this theme?