Photochemistry of Cr(CO)(4)(bpy) (bpy=2,2'-bipyridine) studied by time-resolved infrared spectroscopy

被引：31

作者：

Virrels, IG

George, MW

Turner, JJ

Peters, J

Vlcek, A

机构：

[1] UNIV NOTTINGHAM,DEPT CHEM,NOTTINGHAM NG7 2RD,ENGLAND

[2] ACAD SCI CZECH REPUBL,J HEYROVSKY INST PHYS CHEM,PRAGUE 18223,CZECH REPUBLIC

来源：

ORGANOMETALLICS | 1996年 / 15卷 / 19期

关键词：

D O I：

10.1021/om960369q

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Employing time-resolved IR spectroscopy, we have demonstrated that, following photolysis of Cr(CO)(4)(bpy) (I) in CH2Cl2, the only detectable photoproduct on the 50 ns time scale is the solvated CC-loss intermediate fac-Cr(CO)(3)(bpy)(CH2Cl2) (2); this intermediate is formed following either MLCT (532 nm) or LF (355 nm) excitation. The rate of the back-reaction of 2 with CO has been measured (k(2) = 7.1(+/- 0.5) x 10(6) M(-1)s(-1)); in. the presence of PPh(3), the intermediate 2 reacts to produce fac-Cr(CO)(3)(bpy)(PPh(3)) (3) exclusively (k(2) = 1.0(+/- 0.5) x 10(7) M(-1)s(-1)). From UV/visible flash photolysis data, we conclude that this intermediate 2 is probably produced on, a ps/subps time scale.

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页码：4089 / 4092

页数：4

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