Ruthenium(II) Complexes with NS2 Pyridine-Based Dithia-Containing Ligands. Proposed Possible Structural Isomers and X-ray Confirmation of Their Existence
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- 作者：Clara Viñ ; as ; Pilar Anglè ; s ; Glò ; ria Sá ; nchez ; Natividad Lucena ; Francesc Teixidor ; Lluí ; s Escriche ; Jaume Casabó ; Joan F. Piniella ; Angel Alvarez-Larena ; Raikko K
- 刊名：Inorganic Chemistry
- 出版年：1998
- 出版时间：February 23, 1998
- 年：1998
- 卷：37
- 期：4
- 页码：701 - 707
- 全文大小：202K
- 年卷期：v.37,no.4(February 23, 1998)
- ISSN：1520-510X
文摘
Ligands LX of the type NS2 withS-aryl and S-alkyl substituents which incorporatethe unit 2,6-bis(thiomethyl)pyridine are produced. Their reaction with[RuCl2(PPh3)3] and[RuCl2(DMSO)4] produces the firstreported Ru(II)/NS2 complexes. They present the general formulas[RuCl2(LX )L'], where L'= PPh3 or DMSO. Several isomersare possible; however, only two have been found in each reaction.The 1H NMR spectra show that theHaHbproton atoms of thepyridine-CHaHb-thioether unit arenonisochronous. A 
(HaHb) valueclose to 1 ppm isobserved for the cis complexes while this is smaller for thetrans analogues. The possible distinct isomersarediscussed in terms of steric effects. It is hypothesized that thetrans-dl, the trans-meso,and the cis-meso-E wouldbe the structures more favored. Those structures have beenconfirmed by X-ray diffraction analysis oftrans-dl-[RuCl2(L1)(DMSO)]·0.5MeOH,cis-[RuCl2(L5)(PPh3)]·CH2Cl2,andtrans-meso-[RuCl2(L6)(PPh3)]·1.5MeOH.
(HaHb) valueclose to 1 ppm isobserved for the cis complexes while this is smaller for thetrans analogues. The possible distinct isomersarediscussed in terms of steric effects. It is hypothesized that thetrans-dl, the trans-meso,and the cis-meso-E wouldbe the structures more favored. Those structures have beenconfirmed by X-ray diffraction analysis oftrans-dl-[RuCl2(L1)(DMSO)]·0.5MeOH,cis-[RuCl2(L5)(PPh3)]·CH2Cl2,andtrans-meso-[RuCl2(L6)(PPh3)]·1.5MeOH.