The preparation,polymerization and copolymerization of (η5-vinylcyclopentadienyl)dicarbonylnitrosylchromium, (η5-C5H4CHCH2)Cr(CO)2NO期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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The preparation,polymerization and copolymerization of (η⁵-vinylcyclopentadienyl)dicarbonylnitrosylchromium, (η⁵-C₅H₄CHCH₂)Cr(CO)₂NO

Authors:	EA Mintz MD Rausch BH Edwards JE Sheats TD Rounsefell CU Pittman

Institution:	Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003 U.S.A.;Department of Chemistry, Rider College, Trenton, New Jersey 08602 U.S.A.;Department of Chemistry, University of Alabama, University, Alabama, 35486 U.S.A.

Abstract:	The first report on the preparation, polymerization, and copolymerization of a nitrosyl-containing vinylcyclopentadienylmetal monomer, (η⁵-C₅H₄CHCH₂)-Cr(CO)₂NO, is described. (η⁵-Vinylcyclopentadienyl)-dicarbonylnitrosylchromium (A) was prepared in good yield by the acylation of η⁵-cyclopentadienyl-carbonylnitrosylchromium followed by sodium borohydride reduction of the keto function and acid-catalyzed dehydration. Monomer A homopolymerizes and copolymerizes with styrene, N-vinylpyrrolidone, and vinyl cymantrene in the presence of azo initiators. Reactivity ratios in the copolymerization of A with styrene were r₁ = 0.30 and r₂ = 0.82 from which the value of e for A was found to be ?1.98. Thus, A is an exceptionally electron-rich monomer.

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