Alkynyltellurolato ligands including a solvatochromic rhenium(i) complex

Abstract

Alkynyltellurolato complexes LnM-Te-C = CR (LnM = CpFe(CO)2, CpFe(CO)(PPh3), Re(CO)3(bipy); R = Ph, SiMe3) arise via tellurium insertion into alkynyllithiums followed by metathesis with the corresponding metal halide complex. The rhenium(i) complex displays solvatochromism (hypsochromic shift in polar solvents) for the inter-ligand (TeC CR to bipy) charge transfer which is not, however, observed for the lighter analogue [Re(SeC CSiMe3)(CO)3(bipy)].We gratefully acknowledge the financial support of the Australian Research Council (DP200101222, DP230199215).Peer-reviewe