SYNTHESIS AND CHARACTERIZATION OF THE NEW SELENOMETALATE ANION [IR(SE-4)(3)](3-)

Authors
ALBRECHTSCHMITT TE CODY JA HUPP JT IBERS JA
Citation
Te. Albrechtschmitt et al., SYNTHESIS AND CHARACTERIZATION OF THE NEW SELENOMETALATE ANION [IR(SE-4)(3)](3-), Inorganic chemistry, 34(21), 1995, pp. 5101
Citations number
28
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Inorganic chemistry → ACNP
ISSN journal
00201669
Volume
34
Issue
21
Year of publication
1995
Database
ISI
SICI code
0020-1669(1995)34:21<5101:SACOTN>2.0.ZU;2-V
Abstract
The first selenoiridate anion [Ir(Se-4)(3)](3-) has been obtained as a [K(18-crown-6)](+) salt through the reaction of [Ir(CH3CN)(2)(COE)(2) ][BF4] with [K(18-crown-6)](2)[Se-4] in acetonitrile/DMF at -50 degree s C. [Ir(Se-4)(3)](3-) represents only the second example of a group 9 chalcogenometalate. Variable-temperature Se-77 NMR data provide evide nce of an equilibrium between two conformers of [Ir(Se-4)(3)](3-) in s olution with Delta H = 2.5(5) kcal mol(-1) and Delta S = 11.5(2.2) cal mol(-1) K-1. In the solid state the anion is a Lambda delta delta del ta/Delta lambda lambda lambda racemate.