BULKY AMIDINATE COMPLEXES OF INDIUM(III) - SYNTHESIS AND STRUCTURE OF[CYNC((T)BU)NCY]2INCL

Reaction of 2 equiv of lithium dicyclohexylacetamidinate with InCl3 af fords the new species In[CyNC(Me)NCy]Cl-2 (Cy = cyclohexyl) (1). Compo und 1 reacts with MeLi to yield In[CyNC(Me)NCy]2CH3 (2) and also react s with a third equivalent of amidinate to yield In[CyNC(Me)NCy](3) (3) . Two new bulky amidinate-ligands are prepared by the addition of 'BuL i to CyN=C=NCy and Me(3)SiN=C=CSiMe(3), respectively. Subsequent react ions with InCl3 lead to the high-yield syntheses of In[CyNC(CMe(3))NCy ]Cl-2 (4) and [Me(3)SiN(CMe(3))NSiMe(3)]2InCl. (5). Spectroscopic and elemental analyses confirm the formulas of all of these new species. C ompound 4 is further characterized by X-ray crystallography and shown to possess a distorted trigonal bipyramidal coordination geometry arou nd the metal center with the chloride group in the equatorial position . Crystal data for 4: triclinic, <P(1)over bar>, a = 12.545(7) Angstro m, b = 13.482(8) Angstrom, c = 11.965(6) Angstrom, alpha = 102.08(5)de grees, beta = 92.00(5)degrees, gamma = 64.36(4)degrees, Z = 2, R = 0.0 29, R(w) = 0.045.