Crystallographic study of push-pull ethylenes

  • D. Adhikesavalu
  • Nirupa U. Kamath
  • K. Venkatesan


From structural data of several crystal structure analyses of push-pull ethylenes it is found that C=C bond lengths in this class of molecules are significantly longer than the value for this bond in ethylene. With powerful donors and acceptors such as -NMe2 and -COOMe groups respectively, the C=C bond length is as long as 1.460 å. Correlations are observed between (i) C=C bond lengths and the twist angles about the C=C bond and (ii) C=C bond lengths and the torsional barrier measured by thednmr technique.


X-ray structure analysis push-pull ethylenes C=C bond lengths rotational barriers 


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Copyright information

© Printed in India 1983

Authors and Affiliations

  • D. Adhikesavalu
    • 1
  • Nirupa U. Kamath
    • 1
  • K. Venkatesan
    • 1
  1. 1.Department of Organic ChemistryIndian Institute of ScienceBangaloreIndia

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