COPPER-PROMOTED INTRAMOLECULAR SELENIUM TRANSFER FROM A P=SE GROUP TO A P-CH2-P METHYLENE CARBON PRODUCING AN UNUSUAL METHANESELONE LIGAND

The bis(diphenylphosphino)methane selenides CH2(Ph2P)Ph2PSe and CH2(Ph2PSe)2, react with copper(II) chloride giving an unidentified copper(I) complex; exposure to the air affords the new bifunctional, tridentate iigand bis(diphenylphosphoryl)methaneselone SeC(Ph2PO)2 linking copper(I) and copper(II) in the trinuclear complex [CuII{CuICl2[µ-SeC(Ph2PO)2]}2].

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