Effects of counter anions on stereospecific interactions through π-conjugated systems of sulfur-bridged dinuclear cobalt(III)–platinum(II) complexes with optically active penicillaminates: Synthetic, structural, and spectroscopic studies

Polyhedron ◽  
2007 ◽  
Vol 26 (12) ◽  
pp. 2749-2760 ◽  
Author(s):  
Yasunori Yamada ◽  
Masahiko Inoue ◽  
Yoshitaro Miyashita ◽  
Ken-ichi Okamoto ◽  
Masayuki Koikawa ◽  
...  
Keyword(s):  
Spectroscopic Studies ◽  
Optically Active ◽  
Conjugated Systems

ChemInform Abstract: Synthesis and Spectroscopic Studies of Optically Active N-Acetyl Butenoates and N-Acetyl-2-alkyl-pyrrolin-4-ones.

ChemInform ◽  
2010 ◽  
Vol 33 (27) ◽  
pp. no-no
Author(s):  
Efstathios Gavrielatos ◽  
Giorgos Athanasellis ◽  
Olga Igglessi-Markopoulou
Keyword(s):  
Spectroscopic Studies ◽  
Optically Active

The mechanism of hydrogenation of activated olefins, including prochiral ones, using trans-chlorohydridobis(diop)ruthenium(II)

1980 ◽  
Vol 58 (3) ◽  
pp. 245-250 ◽  
Author(s):  
Brian R. James ◽  
Daniel K. W. Wang
Keyword(s):  
Spectroscopic Studies ◽  
Optically Active ◽  
Title Complex ◽  
Mild Conditions ◽  
Rate Determining Step ◽  
Coordination Sites ◽  
Activated Olefins

Solutions of the title complex trans-HRuCl(diop)2, where diop is an optically active chelating ditertiary, hydrogenate under mild conditions activated olefinic substrates, including prochiral ones in high optical yields. Kinetic and spectroscopic studies on hydrogenation of acrylamide and β-phenylacrylic acid indicate an 'unsaturate' mechanism involving rapid coordination of the substrate to give an alkyl intermediate, that subsequently reacts with H2 in a rate-determining step to yield the saturated product and the starting monohydride complex. A diop ligand dissociates to provide necessary coordination sites at the metal. The α-phenylacrylic acid coordinates more strongly than acrylamide, but hydrogenates more slowly.

Optically active cyclic compounds based on planar chiral [2.2]paracyclophane: extension of the conjugated systems and chiroptical properties

2015 ◽  
Vol 3 (3) ◽  
pp. 521-529 ◽  
Author(s):  
Masayuki Gon ◽  
Yasuhiro Morisaki ◽  
Yoshiki Chujo
Keyword(s):  
Optically Active ◽  
Chiroptical Properties ◽  
Circularly Polarized ◽  
Conjugated Systems ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Cyclic Compounds

Optically active propeller-shaped cyclic compounds based on planar chiral [2.2]paracyclophane emit intense and bright circularly polarized luminescence (CPL).

Spectroscopic studies on some sulphur-containing amino acid complexes of cobalt, nickel and copper

1974 ◽  
Vol 27 (8) ◽  
pp. 1629 ◽  
Author(s):  
RJ Magee ◽  
W Mazurek ◽  
MJ O'Conner ◽  
AT Phillip
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Structural Analysis ◽  
Energy Level ◽  
Spectroscopic Studies ◽  
Optically Active ◽  
Ligand Field ◽  
Spectral Measurements ◽  
X Ray ◽  
Cobalt Nickel

The synthesis of three potentially sexadentate optically active sulphur-containing amino acids, 2,9- diamino-4,7-dithiadecanedioic acid [(R,R)-ebc], 2,ll-diamino-5,8-dithiadodecanedioic acid [(S,S)- ebhc] and 2,7-di(3'-thiabuty1)-3,6-diazaoctanedioic acid [(S,S)-ebm] are described. Some metal complexes of the acids with cobalt, nickel and copper are characterized by spectroscopic measurements. The complex�� (-)589[Co{(S,S)-ebm}] ClO4 is formed stereospecifically and an X-ray structural analysis shows it to have the Δ-trans(O) configuration. The c.d. spectrum shows the presence of three bands due to the splitting of the T1g energy level by the effective C2 symmetry of the ligand field. Some polymeric cobalt(11) and nickel(11) complexes are also described. Spectral measurements indicate an octahedral coordination of the ligands involved. Several copper(11) complexes are also described.

Thermodynamic and spectroscopic studies on the protonation of an optically active polyampholyte

1989 ◽  
Vol 22 (7) ◽  
pp. 3138-3143 ◽  
Author(s):  
Rolando Barbucci ◽  
Mario Casolaro ◽  
Annalisa Di Tommaso ◽  
Agnese Magnani
Keyword(s):  
Spectroscopic Studies ◽  
Optically Active
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