کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1312261 | 1499180 | 2013 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Differences in the CO photolability of cis- and trans-[RuCl2(azpy)(CO)2] complexes: Effect of metal-to-ligand back-bonding Differences in the CO photolability of cis- and trans-[RuCl2(azpy)(CO)2] complexes: Effect of metal-to-ligand back-bonding](/preview/png/1312261.png)
• Both cis and trans isomer of [RuCl2(azpy)(CO)2] have been synthesized from [RuCl2(CO)3]2.
• Both isomers release CO upon exposure to UV light.
• The trans isomer releases CO faster.
Reaction of [RuCl2(CO)3]2 with 2-phenylazopyridine (azpy) in methanolic solution affords cis-[RuCl2(azpy)(CO)2] (1) and trans-[RuCl2(azpy)(CO)2] (2) depending on the temperature of the reaction mixture. In both complexes, the two CO ligands are cis to each other. Competition in π backbonding labilizes CO trans to the azo-N (N3) in 2 and increases the rate of CO photorelease of 2 (the trans isomer) compared to 1 (the cis isomer).
The rate of CO photorelease of trans-[RuCl2(azpy)(CO)2] is considerably higher than that of cis-[RuCl2(azpy)(CO)2] due to the trans-labilizing effect of the azo group in the ligand frame of 2-phenylazopyridine (azpy).Figure optionsDownload as PowerPoint slide
Journal: Inorganica Chimica Acta - Volume 407, 1 October 2013, Pages 121–125