Acta Phys. -Chim. Sin. ›› 1991, Vol. 7 ›› Issue (05): 518-523.doi: 10.3866/PKU.WHXB19910502

• ARTICLE • Previous Articles     Next Articles

Chemical Exchange of Ligand PR″3 of (RC2R)Co(CO)(PR″3)2 IN SOLUTION——TRIPLE-JUMP KINETIC MODEL

Meng Qing-Jin; Sun Shou-Heng; Zhu Dan-Hong; Chen Wei-Bing; P.H.Rieger   

  1. Coordination Chemistry Institute, Nanjing University, Nanjing 210008; Chemistry Department, Brown University, Providence, RI 02912
  • Received:1990-03-27 Revised:1990-11-06 Published:1991-10-15
  • Contact: Meng Qing-Jin

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Abstract: This paper described a detailed theoretical analysis of ESR spectrum line width of the cobalt complex (RC_2R/)Co(CO)(PR"_3)_2 in solution. Triple-jump kinetic model was first used in the Trans-Cis isomerism of the complex.A formula concerning ESR line width as a function of the basic line width T_(20)~(-1), hyperfine splitting constants of all isomers in solution, and lifetime of the exchange of ligand PR"_3 were suggested on the relationship between the correlation function and the hyperfine splitting constant. The calculated, exchange lifetime of the ligand P(OEt)_3 in the title complex (Ph_2C_2)Co(CO)[P(OEt)_3]_2 at 290 K is 5.6×10~(-11) s.

Key words: Cobalt complex, Ligand exchange, Tripe-jump model