High-frequency EPR study of reduced diruthenium and dirhenium polypyridine complexes based on the 1,2,4,5-tetrazine radical bridge

被引：20

作者：

Sarkar, B

Frantz, S

Kaim, W

Duboc, C

机构：

[1] Univ Stuttgart, Inst Anorgan Chem, D-70550 Stuttgart, Germany

[2] CNRS, MPI, Grenoble High Magnet Field Lab, F-38042 Grenoble 9, France

来源：

DALTON TRANSACTIONS | 2004年 / 21期

关键词：

D O I：

10.1039/b407611g

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The radical complexes {(mu-L)[Ru(bpy)(2)](2)}(.3+), {(mu-bmtz)[Ru(cym)Cl](2)}(.+) and {(mu-L)[Re(CO)(3)Cl](2)}(.-), where L are 3,6-disubstituted 1,2,4,5-tetrazines such as 3,6-bis(2-pyrimidyl)-1,2,4,5-tetrazine (bmtz) and cym = p-cymene, were studied by X-band EPR in fluid solution and by 285 GHz EPR in glassy frozen solution. A comparison with other transition metal complexes (Cu, Rh, Os, Ir, Pt) involving tetrazine radical ligands reveals that the g anisotropy reflects (i) the pi acceptor effect of the tetrazine substituents, (ii) the competition from ancillary pi acceptor ligands for back donation from the metal, and (iii) the spin-orbit coupling contributions from the transition metal.

引用

页码：3727 / 3731

页数：5

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