M. Aizenberg et al., ISOLATION, CHARACTERIZATION, AND INTERCONVERSIONS OF (ET(3)P)(2)IR(C2H4)(N)CL (N=1, 2), Organometallics, 15(19), 1996, pp. 4093-4095
The syntheses, characterization, and interconversions of (Et(3)P)(2)Ir
(C2H4)(2)Cl (1) and (Et(3)P)(2)Ir(C2H4(Cl) (2) as well as the X-ray cr
ystal structure of 1 are reported. In solution complex 1 has a stereoc
hemically rigid trigonal-bipyramidal structure with nonrotating ethyle
ne ligands. Formation of complex 1 from complex 2 and ethylene is ther
modynamically favorable; Delta G(298) = -2.12 +/- 0.03 kcal/mol.