Intra- and intermolecular hydrogen bonds in [Ag(PPh3)3(HL)] complexes [H2L: H2xspa = 3(aryl)-2-sulfanylpropenoic acids; H2cpa = 2-cyclopentylidene-2-sulfanylacetic acid] |
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| Authors: | Elena BarreiroJosé S Casas María D CouceAgustín Sánchez José Sordo José M VarelaEzequiel M Vázquez López |
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| Institution: | a Departamento de Química Inorgánica, Facultade de Farmacia, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain
b Departamento de Química Inorgánica, Facultade de Química, Universidade de Vigo, 36310 Vigo, Galicia, Spain |
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| Abstract: | Compounds of the type Ag(PPh3)3(HL)] {H2xspa=3(aryl)-2-sulfanylpropenoic acids: x = Clp 3-(2-chlorophenyl)-], -o-mp 3-(2-methoxyphenyl)-], -p-mp 3-(4-methoxyphenyl)-], -o-hp 3-(2-hydroxyphenyl)-], -p-hp 3-(4-hydroxyphenyl-); H2cpa = 2-cyclopentylidene-2-sulfanylacetic acid} were synthesized and characterised by IR and NMR (1H 13C and 31P) spectroscopy and by FAB mass spectrometry. The crystal structures of Ag(PPh3)3(HClpspa)], Ag(PPh3)3(H-o-mpspa)], Ag(PPh3)3(H-p-mpspa)] and Ag(PPh3)3(Hcpa)] reveal the presence of discrete molecular units containing an intramolecular O-H···S hydrogen bond between the S atom and one of the O atoms of the COOH group. This intramolecular hydrogen bond remains in Ag(PPh3)3(H-o-hpspa)]·EtOH and Ag(PPh3)3(H-p-hpspa)] but in both cases polymeric structures are built on the basis of O-H···O interactions that involve the -OH substituent of the phenyl group of the sulfanylpropenoate fragment. |
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| Keywords: | Silver(I) complexes Hydrogen bonds Sulfanylpropenoic acids Mercaptopropenoic acids X-ray structures |
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