Journal of the Chemical Society, Dalton Transactions p. 4459 - 4462 (1996)
Update date:2022-07-29
Topics:
Reddy, V. Sreenivasa
Katti, Kattesh V.
Volkert, Wynn A.
Water-soluble diphosphine tetraphosphonates [(RO)2OPCH2CH2]2P-X-P[CH 2CH2PO(OR)2]2 (X = C6H4 or C2H4, R = Et or Me) were synthesized in near-quantitative yields by a base-catalysed Michael addition of appropriate P-H bonded compounds to vinylphosphonates in the presence of potassium tert-butoxide. The reactions of these compounds with [ReO2I(PPh3)2] in biphasic media (aqueous-organic) produced water-soluble dioxorhenium complexes of the type [ReO2{[(RO)2OPCH2CH2] 2P-X-P(CH2CH2PO(OR)2] 2}2]+ in nearquantitative yields. The water-soluble phosphines and their rhenium complexes were characterized by IR, 1H and 31P NMR and high-resolution fast atom bombardment mass spectral analysis.
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