A new organometallic photoreaction: interconversion of metal-alkylidene geometric isomers

A new organometallic photoreaction: interconversion of metal-alkylidene geometric isomers
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一种新的有机金属光反应:金属-亚烷基几何异构体的相互转化

DOI:
10.1021/om00062a033
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发表时间:
1982
期刊:
影响因子:
2.8
通讯作者:
J. Gladysz
J. Gladysz
中科院分区:
化学2区
文献类型:
--
作者:
F. B. Mccormick;W. Kiel;J. Gladysz

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(PPh 3X = CHC 6 H5)]+ PF 6”(1),在室温下以> 99:1的背斜(1 t,“热力学”)和向斜(1 k,“动力学”)Re= C键几何异构体的混合物存在,当在-20和-78 ℃之间在CD 2Cl 2,CD 3CN或(CD 3)2CO中照射时异构化为(55±3):(45±3)1 t/1 k光稳态。亚丙基[(77-C5 H5)Re(NO)(PPh 3)(= CHCH 2CH 3)]+ PF 6”(2)在室温下以(95±1):(5±1)的背斜(21)和向斜(2k)异构体的混合物存在,类似地被异构化为(59±2):(41±2)的光稳态。本文报道了1 t和2 t的吸收光谱以及1 t-* 1 k(甘菊环、玫瑰红、曙红Y)光敏化的失败尝试。1 k的热异构化速率
(PPh3X= CHC6H5)]+ PF6"(1), which exists as a> 99: 1 mixture of anticlinal (1t,“thermodynamic”) and synclinal (1k,“kinetic”) Re= C bond geometric isomers at room temperature, is isomerized when irradiated between-20 and-78 C in CD2CI2, CD3CN, or (CD3) 2CO to a (55±3):(45±3) 1t/1k photostationary state. Propylidene [(77-C5H5) Re (NO)(PPh3)(= CHCH2CH3)]+ PF6"(2), which exists as a (95±1):(5±1) mixture of anticlinal (21) and synclinal (2k) isomers at room temperature, is similarly isomerized to a (59±2):(41±2) photostationary state. Absorption spectra of 1t and 2t and unsuccessful attempts to photosensitize 1t—* 1k (azulene, rose bengal, eosin Y) are reported. Thermal isomerization rates for 1k