Preparation and Characterization of Tow kinds of cis-(RuCl(qn)2NO) (Hqn=4-Methyl-, 2,4-dimetyl-, 2-ethly-, or 5-chloro-8-quinolinol), and the Photoinduced Preparation of the trans-(RuCl(qn)2NO) from the cis-Complex.
作者:Hidenori Ikezawa、Eiichi Miki、Kunihiko Mizumachi、Tatujiro Ishimori、Takashi Nagai、Mikio Tanaka
DOI:10.1246/bcsj.66.89
日期:——
A mixture of hydrous trichloronitrosylruthenium(III) and 8-qulinolinol derivative (4-methyl-, 2,4-dimethyl-, 2-ethyl-, or 5-chloro-8-quinolinol) (mole ratio 1 : 4—5) was refluxed in ethyl alcohol in the dark to prepare two kinds of cis-type complexes, [RuCl(qn)2NO] (Hqn = 8–quinolinol derivative), cis-1 and cis-2, as major products. Using 2,4-dimethyl- or 2-ethyl-8-quinolinol, the trans complex was prepared in low yield with the cis-type complexes. The trans complex could be photochemically generated from the cis-1 complex in dichloromethane in good yield. The introduction of an alkyl group with an electrondonating nature to the 2-position in the quinolinol ring could induce the formation of the trans complex. The complexes were characterized by NMR, IR UV-vis, and field desorption mass spectrometries. From the cis-1-trans photoisomerization reaction in the presence of 15NO (15N atom % = 99), a bond rupture between Ru and NO was found to be involved in the reaction.
将水合三氯硝基铑(III)与8-喹啉醇衍生物(4-甲基、2,4-二甲基、2-乙基或5-氯-8-喹啉醇)以1:4-5的摩尔比在黑暗中用乙醇重流反应,制备了两种顺式配合物[RuCl(qn)2NO](Hqn = 8-喹啉醇衍生物),主要产品为顺式-1和顺式-2。使用2,4-二甲基或2-乙基-8-喹啉醇,可以在低产率下与顺式配合物一起制备反式配合物。反式配合物可以通过光化学反应从顺式-1配合物中在二氯甲烷中以较高产率生成。向喹啉醇环的2位引入具有供电子性质的烷基团可以诱导反式配合物的形成。这些配合物通过核磁共振(NMR)、红外光谱(IR)、紫外-可见光谱(UV-vis)和场解吸质谱(field desorption mass spectrometries)进行了表征。通过含有15NO(15N原子百分比=99)的顺式-1与反式光异构化反应发现,反应中涉及铑与NO之间的键断裂。