Alkene dissociation from a d0 yttrocene-alkyl-alkene complex generates a pyramidal alkyl yttrium complex that inverts slowly

被引：43

作者：

Casey, CP ^{[1
]}

Fagan, MA ^{[1
]}

Hallenbeck, SL ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Chem, Madison, WI 53706 USA

来源：

ORGANOMETALLICS | 1998年 / 17卷 / 03期

关键词：

D O I：

10.1021/om971008t

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The d(0) yttrium(III)-alhyl-alkene chelate Cp*Y-2[eta(1):eta(2)-CH2CH2CH(CH3)CH=CH2] (5) was prepared by reaction of 3-methyl-1,4-pentadiene with (Cp*(2)-YH)(2). VariabLe-temperature C-13 NMR spectroscopy of 5 showed that the environments of the two diastereotopic Cp* ligands were averaged by a fluxional process which requires both reversible alkene dissociation and inversion at the yttrium center; the energy barrier fur alkene dissociation pins yttrium inversion is 9.6 +/- 0.3 kcal mol(-1).

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页码：287 / 289

页数：3

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