Synthesis, Characterization, and Thermal Decomposition of Cl(sub 2)GaP(SiMe (sub 3))22, a Potential Precursor to Gallium Phosphide.

摘要

Cl(sub 2)GaP(SiMe3)22 (1) has been prepared form the 1:1 reaction of GaCl3 with P(SiMe3)3. Thermal decomposition of 1 produces a brown powder which contains GaP, as evidenced by an X-ray powder pattern and partial elemental analysis. Compound 1 crystallizes in the monoclinic space group P21/n ( 14) with a - 9.754(2), b = 15.585(5), c = 9.839(2) angstrom, and Beta = 96.18(1) deg , is composed of a planar Ga-P-GA-P ring, with Ga-P bond distances of 2.378(2) and 2.380(2) Angstrom, and contains exocyclic chlorine and SiMe3 ligands. The ring core is a slightly distorted square, with Ga-P-Ga' and P-Ga-P' bond angles of 86.41(7) and 93.59(7) deg, respectively. Additionally, H NMR confirms that 1 exhibits monomer-dimer equilibrium in solution.