Useful model of optical activity. X. Absolute configuration and chiroptical properties of optically active 1,1'-spirobiindan, 1,1'-spirobiindene, and 1,1'-spirobiindanone

1973 ◽  
Vol 95 (4) ◽  
pp. 1217-1229 ◽  
Author(s):  
James H. Brewster ◽  
Robert T. Prudence
Keyword(s):  
Optical Activity ◽  
Absolute Configuration ◽  
Optically Active ◽  
Chiroptical Properties

Bond fixation in annulenes. 5. Absolute configuration and chiroptical properties of optically active 1,2,3-trimethyl- and 1,2,3,4-tetramethylcyclooctatetraenes

1979 ◽  
Vol 101 (6) ◽  
pp. 1615-1617 ◽  
Author(s):  
John M. Gardlik ◽  
Larry K. Johnson ◽  
Leo A. Paquette ◽  
Barbara A. Solheim ◽  
James P. Springer ◽  
...  
Keyword(s):  
Absolute Configuration ◽  
Optically Active ◽  
Chiroptical Properties

Methacrylic polymers bearing side-chain permanent dipole azobenzene chromophores spaced from the main chain by chiral moieties, 3 a Synthesis and chiroptical properties of the homopolymer of (R)-3-methacryloyloxy-1-(4’-nitro-4-azobenzene)- pyrrolidine and of copolymers with the enantiomeric monomer (S)-3-methacryloyloxy-1-(4’-nitro-4-azobenzene)- pyrrolidine

e-Polymers ◽  
2003 ◽  
Vol 3 (1) ◽  
Author(s):  
Luigi Angiolini ◽  
Loris Giorgini ◽  
Elisabetta Salatelli
Keyword(s):  
Radical Polymerization ◽  
Optical Activity ◽  
Main Chain ◽  
Optically Active ◽  
Side Chain ◽  
Chiroptical Properties

Abstract The optically active photochromic homopolymer deriving from radical polymerization of the monomer (R)-3-methacryloyloxy-1-(4’-nitro-4-azobenzene)- pyrrolidine, containing a chiral group of one prevailing configuration interposed between the methacrylic moiety and the photochromic azoaromatic chromophore, has been synthesized and characterized. Copolymers with the enantiomeric monomer (S)-3-methacryloyloxy-1-(4’-nitro-4-azobenzene)pyrrolidine have also been prepared in order to evaluate the effect on the overall optical activity of side chain chiral groups of opposite configuration in various ratios. The spectroscopic and chiroptical properties in solution of the polymeric derivatives have been assessed.

Transition metal mediated asymmetric synthesis. II. Complete resolution of (2R,5S)-(-)-Tricarbonyl[1-5-η-(2-methoxy-5-methylcyclohexadienyl)]iron(1+) hexafluorophosphate(1 -) by selective crystallization of enantiomers

1981 ◽  
Vol 34 (11) ◽  
pp. 2339 ◽  
Author(s):  
GR Stephenson
Keyword(s):  
Absolute Configuration ◽  
Complete Resolution ◽  
Optical Purity ◽  
Rotatory Power ◽  
Optically Active ◽  
Dimethyl Malonate ◽  
Chiroptical Properties ◽  
Selective Crystallization ◽  
Active Salt ◽  
Limiting Value

The resolution of tricarbonyl(1-5-η-cylcohexadienyl)iron(1+) salts can be achieved by selective crystallization of enantiomers. The magnitude of the specific rotatory power of the title salt (1) was increased to a limiting value which was shown to correspond to optical purity, by a direct, n.m.r. method, after alkylation with dimethyl malonate. Reduction of the optically active salt defined the absolute configuration of (2R,5S)-(+ )-tricarbonyl[l-4-η-(2-methoxy-5β-methylcyclohexa-1,3-diene)]-iron(0). The chiroptical properties of the products are discussed.

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