Studies of chelation. Part 9. Cobalt complexes of 1-[(substituted phenyl)azo]-2-naphthol and 1-[(substituted phenylimino)methyl]-2-naphthol ligands. Tautomerism and reactivity
作者:Joseph A. Connor、David J. Fine、Raymond Price
DOI:10.1039/dt9810000559
日期:——
naphthalene rings is a critical feature of the chelation process. The formation of [Co(R-az)3] from [Co(R-az)2] and from [Co(R-Haz)2X2] in the presence of air occurs easily and is acid catalysed. [Co(R-sb)3] is formed only under vigorously oxidising conditions. The isoelectronic ligands R-Haz and R-Hsb should not be regarded as identical in their reactivity towards cobalt(II).
光谱表征(1 H和13 C NMR,IR,拉曼光谱,和UV-可见光)的各种1 - [(取代的苯基)偶氮] -2-萘酚,R-哈兹(R = 4'--ME,4'- OMe,4'-Cl,H,2'-OMe,2'-Me,2'-Cl和2'-Br)和1-[(取代的苯基亚氨基)甲基] -2-萘,R-Hsb( R = 4'- OME,4'--ME,4'-氯,H,4'-BR,4'-CF 3,4'-CN,4'- NO 2,2'-OME,2'-ME ,2'-CHME 2,2'-氯,2'- CN,和2'-NO 2),在固体状态下和在极性和非极性溶剂中的溶液表明,氢键酮互变异构体在极性溶剂中占主导地位。钴(II)盐与R-Haz和R-Hsb在乙醇中反应生成[CoL 2 ],顺式-[Co(HL)2 X 2 ]和fac- [CoL 3 ](L = R-az或R-sb)。这些配合物中的配体的互变异构形式是通过振动光谱法建立的,在[Co(R-az)2