Formation of [Pt(η3-allyl)(TPPTS)2]+ from Reaction of cis-Pt(Cl)2(TPPTS)2 with Alkenols in Water

Autor:	David S. Phaho, Jim D. Atwood, Derrik S. Helfer
Rok vydání:	2005
Předmět:	chemistry.chemical_classification Alkene Stereochemistry Organic Chemistry chemistry.chemical_element Medicinal chemistry Catalysis Inorganic Chemistry chemistry.chemical_compound chemistry Deuterium Physical and Theoretical Chemistry TPPTS Platinum Isomerization
Zdroj:	Organometallics. 25:410-415
ISSN:	1520-6041 0276-7333
DOI:	10.1021/om050540a
Popis:	Reactions of alkenols with cis-Pt(Cl)2(TPPTS)2 (TPPTS = P(m-C6H4SO3Na)3) in water result in [Pt(η3-allyl)(TPPTS)2]+ as the exclusive platinum product with 1 equiv of oxidized alkenol. The η3-allyl is not fluxional in water, and the syn and anti isomers can be distinguished at room temperature. For 3-buten-1-ol and 4-penten-1-ol, in addition to the η3-allyl complex and oxidation of the alkene, catalytic isomerization of the alkene is observed. No reaction occurs for cis-Pt(Cl)2(P(p-tolyl)3)2, cis-Pt(Cl)(THF)(P(p-tolyl)3)2+, or cis-Pt(THF)2(P(p-tolyl)3)22+ with the alkenols in THF, indicating the importance of H2O. Excess Cl- inhibits the reaction. The oxidation product is selectively deuterated. These observations are combined into a proposed mechanism.
Databáze:	OpenAIRE
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