首页> 外文期刊>Inorganica Chimica Acta >Aquation reactions of Ru-II and Ru-II dichloro complexes with 1-(3-propylammonium)cyclam - Properties of trans-[RuClL(1-(3-propylammonium)cyclam)](n+) complexes (L = Cl-, tfms(-), H2O)
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Aquation reactions of Ru-II and Ru-II dichloro complexes with 1-(3-propylammonium)cyclam - Properties of trans-[RuClL(1-(3-propylammonium)cyclam)](n+) complexes (L = Cl-, tfms(-), H2O)

机译:Ru-II和Ru-II二氯配合物与1-(3-丙基铵)环酰胺的水合反应-反式[[RuClL(1-(3-丙基铵)环酰胺)](n +)配合物的性质(L = Cl-,tfms (-),H2O)

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摘要

The syntheses and characterization of trans-[(RuClL)-Cl-III(1-(3-propylammonium)cyclam)](n+) (L = Cl-, trifluoromethanesulfonate, H2O; 1-(3-propylammonium)cyclam = 1-(3-propylammonium)-1,4,8,11-tetraazacyclotetradecane) are described. The pK(a) values of the propylammonium branch are 7.6 and 7.8 for the dichloro and chlorohydroxo complexes, respectively. The reduction potentials, E-1/2', for the Ru-III/II processes are -385 and -240 mV vs Ag/AgCl for the dichloro and chloroaqua complexes, respectively. All compounds have one UV-Vis absorption band in the 300-360 nm assigned as ligand to metal charge transfer, similar to the corresponding cyclam complexes. The complex trans-[(RuCl2)-Cl-III(1-(3-propylammonium)cyclam)](2+) releases one Cl- forming trans-[(RuCl2)-Cl-III(H2O)(1-(3-propylammonium)cyclam)](2+) in aqueous solution at pH 1 (k = 8.2 x 10(-5) s(-1); 25 degreesC); the coordinated water of trans-[(RuCl)-Cl-III(H2O)(1-(3-propylammonium)cyclam)](3+) has a pK(a) of 3.1. The reduced complex trans-[(RuCl2)-Cl-II(1-(3-propylammonium)cyclam)](+) aquates chloride by pseudo-first-order kinetics with k = 0.29 s(-1). Those rates are larger than in the corresponding cyclam complexes and are explained on the basis of the decrease of cyclam nitrogen-hydrogen bonding interactions with the chloro ligands in the substituted cyclam. (C) 2003 Elsevier B.V. All rights reserved. [References: 31]
机译:反式[[(RuClL)-Cl-III(1-(3-丙基铵)环)](n +)(L = Cl-,三氟甲磺酸盐,H2O; 1-(3-丙基铵)环)= 1-的合成和表征描述了(3-丙基铵)-1,4,8,11-四氮杂环十四烷。对于二氯和氯代羟基配合物,丙基铵支链的pK(a)值分别为7.6和7.8。 Ru-III / II工艺的还原电位E-1 / 2'对二氯和氯水配合物分别为-385和-240 mV,相对于Ag / AgCl。所有化合物均在300-360 nm处具有一个UV-Vis吸收带,类似于相应的cyclam络合物,被指定为金属电荷转移的配体。复杂的反式-[((RuCl2)-Cl-III(1-(3-丙基铵)环))(2+)释放一个形成Cl的反式-[(RuCl2)-Cl-III(H2O)(1-(3 -(丙基铵)(环酰胺))(2+)在pH 1的水溶液中(k = 8.2 x 10(-5)s(-1); 25摄氏度);反式-[((RuCl)-Cl-III(H2O)(1-(3-丙基铵)环))(3+)的配位水的pK(a)为3.1。还原的复杂反式-[((RuCl2)-Cl-II(1-(3-丙基铵)环))(+)通过拟一级动力学以k = 0.29 s(-1)溶解氯化物。那些速率大于相应的Cyclam络合物中的速率,并基于取代的Cyclam中Cyclam氮-氢键与氯配体的相互作用减少的原因进行解释。 (C)2003 Elsevier B.V.保留所有权利。 [参考:31]

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