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Reflectance circular dichroism of solid‐state chiral coordination compounds
Author(s) -
Bilotti Ivano,
Biscarini Paolo,
Castiglioni Ettore,
Ferranti Francesco,
Kuroda Reiko
Publication year - 2002
Publication title -
chirality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.43
H-Index - 77
eISSN - 1520-636X
pISSN - 0899-0042
DOI - 10.1002/chir.10136
Subject(s) - chemistry , circular dichroism , coordination complex , solid state , spectral line , metal , crystallography , vibrational circular dichroism , coordination number , diffuse reflectance infrared fourier transform , analytical chemistry (journal) , reflectivity , absolute configuration , ion , stereochemistry , organic chemistry , physics , photocatalysis , astronomy , catalysis , optics
Solid‐state diffuse reflectance circular dichroism (DRCD) spectra of some chiral Λ‐ and Δ‐M[(A⁁A) n ] m+ coordination compounds [M(III) = Cr, Co; A⁁A = ethylendiamine (en), O,O′‐2( R )3( R )dimethylethylene dithiophosphate ion, ( R,R )bdtp − , sepulchrate (Sep); n = 1, 3; m = 0, 3] were measured and compared with their solution, nujol mull, and KBr pellet spectra in the spectral region of 300–800 nm. The validity of the DRCD method to obtain reliable CD spectra which reflect a correct absolute configuration at the metal coordination center as well as subtle changes in the stereochemistry of the compound in the solid vs. solution states was proved. DRCD is the only spectroscopic method to examine randomly oriented chiral compounds without the effect of pressure, solvent, or diluting media such as KBr or nujol (which lends the sample irrecoverable and may interact with the sample), and directly relate to the structure that is revealed by X‐ray diffractometry. Chirality 14:750–756, 2002. © 2002 Wiley‐Liss, Inc.