Abstract
Three new heavier group 13 element compounds containing three different substituents, (Me 3CCH 2)ClGaPPh 2, (Me 3CCH 2)BrGaPPh 2 and (Me 3CCH 2)ClInPPh 2, have been prepared and characterized. All compounds were characterized by partial elemental analysis, cryoscopic molecular weight studies in benzene solution, and NMR and IR spectroscopic data. All three compounds exist as trimeric molecules in solution. NMR spectral data were consistent with the presence of multiple isomers of the trimers. The compound [(MC 3CCH 2)ClGaPPh 2] 3 crystallizes in the acentric space group Pn2 1 a with a = 17.741(9) Å, b = 13.942(6) Å and c = 21.574(8) Å. Diffraction data were collected on an Enraf-Nonius CAD-4 diffractometer, and the structure was refined to R = 4.6% and R w = 6.0% for those 2971 reflections with [ F o >s- 5σ( F o)]. The GaP six-membered ring has a typical chair conformation with the bulky neopentyl groups occupying the E,A,A, positions. Distances of interest include GaCl = 2.209(4), 2.219(4) and 2.220(4) Å and GaP(bridging) which range from 2.414(3) Å to 2.433(4) Å.
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