Optimum conditions for the synthesis of aryl-dibenzo-oxaphosphorines (2) from the corresponding phosphonous chloride (1) were explored to avoid the formation of by-products (e.g., 4-6). The aryl-dibenzo-oxaphosphorines (2) were converted to the P-oxides (3), and were utilized in the synthesis of phosphinite-boranes 7 and Pt(II) complexes 8. Depending on the aryl substituent, the Pt(II) complex (8) was formed with cis and trans geometry. (C) 2004 Wiley Periodicals, Inc.
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