Computational studies of cis– and trans–isomer preferences of low-spin d6 [M(DABF)2A2]+ and [M(CO)4A2]+ complexes (M = Co, Rh, Ir; A = anionic ligand): spectator ligand π-backbonding and DFT exchange

Synthesis, characterization, X-ray and electronic structures of diethyl ether and 1,2-dimethoxyethane adducts of molybdenum(iv) chloride and tungsten(iv) chloride

“…It has been noted before 50 that the existence of the thermodynamic trans influence 51 makes it surprising that six-coordinate pseudo-octahedral complexes of the MA 2 B 4 type ever form trans isomers. If A is more trans -influencing than B, the A ligands should prefer cis positions; if B is more trans -influencing than A, the B ligands should minimize B–M–B trans -positioning, again giving a preference for the cis geometry.…”