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Nuclear quadrupole resonance in chloromethylphenols
Author(s) -
Kalathimattam Roy Sebastian,
Bai Amitha,
Uchil Jayagopal
Publication year - 1991
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.1260290720
Subject(s) - chemistry , nuclear quadrupole resonance , atmospheric temperature range , quadrupole , nuclear magnetic resonance , resonance (particle physics) , melting point , molecule , phase (matter) , phenol , range (aeronautics) , analytical chemistry (journal) , atomic physics , organic chemistry , thermodynamics , physics , materials science , composite material
The temperature dependences of the 35 Cl nuclear quadrupole resonance (NQR) frequencies of 4‐chloro‐3‐methyl‐, 2‐chloro‐5‐methyl‐ and 4‐chloro‐2‐methyl‐phenol were studied in the temperature range from 77 K up to the respective melting points. 4‐Chloro‐2‐methylphenol undergoes a phase transition at ca 185 K, and the presence of trans – cis isomeric forms is inferred. The NQR frequencies of molecules at absolute zero temperature were evaluated.