SYNTHESIS, X-RAY CRYSTAL-STRUCTURE AND SPECTROSCOPY OF THE HYDROGEN-BRIDGED DIMER [CR-III(L-CENTER-DOT-H(3)L)CR-III][PF6](3) (H(3)L=N,N',N''-TRIS[(2S)-2-HYDROXYPROPYL]-1,4,7-TRIAZACYCLONONANE)

被引：14

作者：

FARRUGIA, LJ ^{[1
]}

MACDONALD, NM ^{[1
]}

PEACOCK, RD ^{[1
]}

ROBB, J ^{[1
]}

机构：

[1] UNIV GLASGOW, DEPT CHEM, GLASGOW G12 8QQ, LANARK, SCOTLAND

来源：

POLYHEDRON | 1995年 / 14卷 / 04期

关键词：

D O I：

10.1016/0277-5387(94)00265-G

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The preparation, structure and spectroscopy of [Cr-III(L. H(3)L)Cr-III][PF6](3) (H(3)L = N,N',N''-tris[(2S)-2-hydroxypropyl]-1,4,7-triazacyclononane) are presented. The complex is a hydrogen-bridged dimer with three symmetric O-H-O bridges. The coor; dination round the Cr-III is preudo-octahedral with a twist away from octahedral geometry of 15 degrees. The dimer is broken up under both acid and basic conditions to give [Cr(III)LH(3)](3+) and [Cr(III)L], respectively. The CD spectra of the three species are interpreted as showing that there is a smaller twist away from octahedral geometry in the monomers than in the dimer. The preparation of [Cr-III(S-mtcta)] (S-mtcta = N,N',N''-trisacetato-(2S)-2-methyl-1,4,7-triazacyclononane) is also reported and its spectra compared with those of[Cr-III(L.H(3)L)Cr-III](3+).

引用

页码：541 / 545

页数：5

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