{"title":"钼和钨的配位化学。8-羟基喹啉氧钼(V)配合物及EPR光谱与黄酶结合位点的相关性","authors":"Charles A. McAuliffe, Barry J. Sayle","doi":"10.1016/S0006-3061(00)80166-0","DOIUrl":null,"url":null,"abstract":"<div><p>MoOCl<sub>3</sub>(THF)<sub>2</sub> (THF = tetrahydrofuran) reacts with 8-hydroxyquinoline (QH) to form [MoOCl<sub>3</sub>(QH)<sub>2</sub>], which contains neutral monodentate ligands, [MoOCl(Q)<sub>2</sub>], and anionic bidentate ligands, and the dimeric [Mo<sub>2</sub>O<sub>3</sub>(Q)<sub>4</sub>], which contains anionic bidentate ligands and both terminal and bridging oxo donors. In dichloromethane [MoOCl<sub>3</sub>(QH)<sub>2</sub>] dissolves to give three species, and epr measurements identify these as unchanged [MoOCl<sub>3</sub>(QH)<sub>2</sub>], [MoOCl(Q)<sub>2</sub>] and a third species characterised by a value of 1.979. No g value of this magnitude has previously been obtained for molybdenum(V) complexes which do not contain sulphur donors, and the significance of epr measurements as an indication of the nature of molybdenum coordination in flavoenzymes must be questioned. These complexes have also been characterised by vibrational and electronic spectral measurements.</p></div>","PeriodicalId":9177,"journal":{"name":"Bioinorganic chemistry","volume":"8 4","pages":"Pages 331-339"},"PeriodicalIF":0.0000,"publicationDate":"1978-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0006-3061(00)80166-0","citationCount":"2","resultStr":"{\"title\":\"Coordination chemistry of molybdenum and tungsten—VIII. Oxomolybdenum(V) complexes of 8-hydroxyquinoline and relevance of EPR spectra to binding sites in flavoenzymes\",\"authors\":\"Charles A. McAuliffe, Barry J. Sayle\",\"doi\":\"10.1016/S0006-3061(00)80166-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>MoOCl<sub>3</sub>(THF)<sub>2</sub> (THF = tetrahydrofuran) reacts with 8-hydroxyquinoline (QH) to form [MoOCl<sub>3</sub>(QH)<sub>2</sub>], which contains neutral monodentate ligands, [MoOCl(Q)<sub>2</sub>], and anionic bidentate ligands, and the dimeric [Mo<sub>2</sub>O<sub>3</sub>(Q)<sub>4</sub>], which contains anionic bidentate ligands and both terminal and bridging oxo donors. In dichloromethane [MoOCl<sub>3</sub>(QH)<sub>2</sub>] dissolves to give three species, and epr measurements identify these as unchanged [MoOCl<sub>3</sub>(QH)<sub>2</sub>], [MoOCl(Q)<sub>2</sub>] and a third species characterised by a value of 1.979. No g value of this magnitude has previously been obtained for molybdenum(V) complexes which do not contain sulphur donors, and the significance of epr measurements as an indication of the nature of molybdenum coordination in flavoenzymes must be questioned. These complexes have also been characterised by vibrational and electronic spectral measurements.</p></div>\",\"PeriodicalId\":9177,\"journal\":{\"name\":\"Bioinorganic chemistry\",\"volume\":\"8 4\",\"pages\":\"Pages 331-339\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1978-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S0006-3061(00)80166-0\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Bioinorganic chemistry\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0006306100801660\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bioinorganic chemistry","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0006306100801660","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Coordination chemistry of molybdenum and tungsten—VIII. Oxomolybdenum(V) complexes of 8-hydroxyquinoline and relevance of EPR spectra to binding sites in flavoenzymes
MoOCl3(THF)2 (THF = tetrahydrofuran) reacts with 8-hydroxyquinoline (QH) to form [MoOCl3(QH)2], which contains neutral monodentate ligands, [MoOCl(Q)2], and anionic bidentate ligands, and the dimeric [Mo2O3(Q)4], which contains anionic bidentate ligands and both terminal and bridging oxo donors. In dichloromethane [MoOCl3(QH)2] dissolves to give three species, and epr measurements identify these as unchanged [MoOCl3(QH)2], [MoOCl(Q)2] and a third species characterised by a value of 1.979. No g value of this magnitude has previously been obtained for molybdenum(V) complexes which do not contain sulphur donors, and the significance of epr measurements as an indication of the nature of molybdenum coordination in flavoenzymes must be questioned. These complexes have also been characterised by vibrational and electronic spectral measurements.
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