The binuclear complexes [M2(dimen)4](Y)2 (M = Rh, Ir; dimen = 1,8-diisocyanomenthane; Y = PF6, tetrakis[3,5-bis(trifluoromethyl)phenyl]borate), and B(C6H5)4) have face-to-face structures with M−M distances between 3.60 and 4.48 Å, and square-planar unit twist angles between 0 and 17.2°. Ligand flexing and out-of-plane bending of the metal centers accommodate M−M distances longer than 3.9 Å; addition of a torsional deformation produces a twisted conformation for shorter M−M distances (<3.9 Å). Spectroscopic data indicate that there are two or more deformational isomers of Ir2(dimen)42+ in solution.
No takes yet. Share an insight, caveat, or question.
Exstrom et al. (1996) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: