DETERMINATION OF METAL HYDRIDE AND METAL-LIGAND (L = CO, N2) BOND-ENERGIES USING PHOTOACOUSTIC CALORIMETRY

被引：20

作者：

BELT, ST ^{[1
]}

SCAIANO, JC ^{[1
]}

WHITTLESEY, MK ^{[1
]}

机构：

[1] UNIV OTTAWA,DEPT CHEM,OTTAWA K1N 6N5,ONTARIO,CANADA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 1993年 / 115卷 / 05期

关键词：

D O I：

10.1021/ja00058a043

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Photoacoustic calorimetry has been used to determine the M-H mean bond dissociation energies in Ru(dmpe)2H2 (dmpe = Me2PCH2CH2PMe2) and H2IrCl(CO)(PPh3)2 (63.5 +/- 2.0 and 64.0 +/- 1.0 kcal mol-1, respectively). The quantum yield for loss of H-2 from the ruthenium dihydride complex has been measured by transient actinometry as 0.85 +/- 0.05. Ru(dmpe)2 is an unsolvated intermediate and reacts with CO and N2 to form Ru(dmpe)2CO and Ru(dmpe)2N2. By measuring the enthalpies of these reactions and utilizing the Ru-H mean bond dissociation energy, the Ru-CO and Ru-N2 bond energies have been determined (43.0 +/- 2.0 and 18.8 +/- 2.0 kcal mol-1, respectively).

引用

页码：1921 / 1925

页数：5

共 43 条

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