1 H NMR additive shielding coefficients ( Z ) for organoseleno groups in vinyl selenides | Zendy

Ferraz Helena M. C. | Zendy; Comasseto Jaão V. | Zendy; Brandt Carlos A. | Zendy

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1 H NMR additive shielding coefficients ( Z ) for organoseleno groups in vinyl selenides

Author(s) -

Ferraz Helena M. C.,

Comasseto Jaão V.,

Brandt Carlos A.

Publication year - 1987

Publication title -

magnetic resonance in chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.483

H-Index - 72

eISSN - 1097-458X

pISSN - 0749-1581

DOI - 10.1002/mrc.1260250111

Subject(s) - chemistry , electromagnetic shielding , shielding effect , proton nmr , medicinal chemistry , stereochemistry , organic chemistry , quantum mechanics , physics , layer (electronics)

Additive shielding parameters for the phenylseleno group ( Z PhSe‐ gem = 1.36; Z PhSe‐ cis = 0.31; Z PhSe‐ trans = 0.29) have been estimated. Examples of the calculation of chemical shifts for olefinic protons in vinylic selenides by means of these increments are given. A comparison with 2‐pyridylseleno and methylseleno substituents has been made. The standard deviations of the Z values are 0.06 for Z PhSe‐ gem , 0.10 for Z PhSe‐ cis and 0.05 for Z PhSe‐ trans .

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