199Hg-1H Spin-spin coupling in vinyl and ethynyl mercurials

1964 ◽  
Vol 17 (11) ◽  
pp. 1204 ◽  
Author(s):  
PR Wells ◽  
W Kitching
Keyword(s):  
Coupling Constants ◽  
Spin Coupling ◽  
Spin Coupling Constants ◽  
Cis And Trans ◽  
Spin Spin Coupling

The proton magnetic spectra of cis and trans-2-chlorovinylmercuric chloride, bis(trans-2-chlorovinyl)mercury, and methylethynylmercury have been determined. Large variations in the 199Hg-1H spin-spin coupling constants are observed for different hybridization states and different geometries.

Information from stereospecific spin–spin couplings about the relative absorptivities of the hydroxyl stretching bands in 2-iodophenol solutions

1981 ◽  
Vol 59 (21) ◽  
pp. 3021-3025 ◽  
Author(s):  
Ted Schaefer ◽  
Rudy Sebastian ◽  
Timothy A. Wildman
Keyword(s):  
Free Energy ◽  
Molecular Orbital ◽  
Coupling Constants ◽  
Spin Coupling ◽  
Molecular Orbital Calculations ◽  
Temperature Dependent ◽  
Hydroxyl Proton ◽  
Spin Coupling Constants ◽  
Cis And Trans ◽  
Spin Spin Coupling

The stereospecific spin–spin coupling constants between the hydroxyl proton and the ring protons for 2-iodophenol in various solvents yield some free energy differences between the cis and trans conformations of this molecule at 305 K. Comparison with areas of the hydroxyl stretching bands in the same or similar solvents shows that the ratio of the absorptivity coefficients for the two conformers is sensitive to solvent. It is suggested that this ratio is temperature dependent and therefore apparent enthalpy differences must be considered tentative for at least some solutions. Molecular orbital calculations are consistent with the arguments concerning the absorptivity coefficients.

Flavan derivatives. XVI. Acid-catalysed reactions of secondary benzyl alcohols and 1-tetralols in methanol

1967 ◽  
Vol 20 (10) ◽  
pp. 2137 ◽  
Author(s):  
JW Clark-Lewis ◽  
V Nair
Keyword(s):  
Acetic Acid ◽  
Hydrogen Chloride ◽  
Coupling Constants ◽  
Spin Coupling ◽  
Dibenzyl Ether ◽  
Proton Coupling ◽  
Spin Coupling Constants ◽  
Acid Catalysed Reactions ◽  
Cis And Trans ◽  
Spin Spin Coupling

Under solvolytic conditions I-phenylpropan-1-01 and its p-methyl and p-methoxy derivatives gave 1 -arylprop- 1 -enes. 1 -(3,4-Dimethoxypheny1)propan- 1-01 behaved similarly, but in addition gave the known propene dimer di-isohomogenol (di-isoeugenol dimethyl ether). Ring-proton coupling constants (J 7.3 and 9.2 CIS) appear consistent with a staggered trans-trans-configuration for this dimer,$ in agreement with earlier interpretations of chemical evidence. 1-(2,4,6-Trimethoxy- pheny1)propan-1-01 proved very reactive and gave the symmetrical dibenzyl ether under very mild acid catalysis, but with higher acid concentration it gave the prop-1-ene accompanied by a 1,l-diarylpropane formed by electrophilic displace- ment of the propan-1-01 side-chain. Tetralin-1-01 and cis- and trans-tetralin-1,2-diols, which lack activating aromatic substituents, were stable towards methanolic acetic acid (3%) or hydrogen chloride (3%). 6-Methoxytetralin-1-01, however, gave 1,6-dimethoxytetralin with methanolic 0.001% acetic acid, but with higher tetra101 concentration it gave the symmetrical bis-tetralyl ether. 6-Methoxytetralin-1-01 gave 3,4-dihydro-6-methoxynaphthalene and its known dimer when heated with methanolic hydrogen chloride (1%). Nuclear magnetic resonance showed that the tetralins are conformationally mobile, and the spectra were consistent with rapid interconversion of two half-chair conformations. 3-Phenyltetralin-1-01 (tetralin analogue of flavan-3-01) was obtained in the l,3-cis-form and existed in the confor- mationally stable half-chair form with both substituents equatorial. Spin-spin coupling constants of cis- and trans-carbonates of tetralin-1,2-diols are close to values recorded for their flavandiol analogues.

ChemInform Abstract: NITROGEN-15-CARBON-13 SPIN-SPIN COUPLING CONSTANTS OF CIS- AND TRANS-1-ALKYL-2-ARYL-3-BENZOYLAZIRIDINES

1979 ◽  
Vol 10 (42) ◽  
Author(s):  
P. TARBURTON ◽  
J. P. EDASERY ◽  
C. A. KINGSBURY ◽  
A. E. SOPCHIK ◽  
N. H. CROMWELL
Keyword(s):  
Coupling Constants ◽  
Spin Coupling ◽  
Spin Coupling Constants ◽  
Cis And Trans ◽  
Spin Spin Coupling

Nitrogen-15-carbon-13 spin-spin coupling constants of cis- and trans-1-alkyl-2-aryl-3-benzoylaziridines

1979 ◽  
Vol 44 (12) ◽  
pp. 2041-2042 ◽  
Author(s):  
Philip Tarburton ◽  
James P. Edasery ◽  
Charles A. Kingsbury ◽  
Alan E. Sopchik ◽  
Norman H. Cromwell
Keyword(s):  
Coupling Constants ◽  
Spin Coupling ◽  
Spin Coupling Constants ◽  
Cis And Trans ◽  
Spin Spin Coupling

Vibrational and thermal averaging of the indirect nuclear spin-spin coupling constants of CH4, SiH4, GeH4 and SnH4

1997 ◽  
Vol 91 (5) ◽  
pp. 897-907 ◽  
Author(s):  
SHEELA KIRPEKAR ◽  
THOMAS ENEVOLDSEN ◽  
JENS ODDERSHEDE ◽  
WILLIAM RAYNES
Keyword(s):  
Nuclear Spin ◽  
Coupling Constants ◽  
Spin Coupling ◽  
Spin Coupling Constants ◽  
Spin Spin Coupling
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