Carbon-13 Nuclear Magnetic Resonance Studies of Some Methyl Substituted Diphenylmethanes
Keyword(s):
Carbon-13 n.m.r. chemical shifts are reported for diphenylmethane and nine methylated derivatives. Results are compared with those for related methylbenzenes. In the case of tri-ortho-substituted materials the predominance of a perpendicular conformation is suggested. Ring current calculations show that in contrast to the 1H chemical shift interpretations, the 13C shielding trends cannot originate primarily from anisotropic effects.
1967 ◽
Vol 89
(25)
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pp. 6784-6785
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1970 ◽
Vol 66
◽
pp. 1843
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Keyword(s):
1973 ◽
Vol 14
(2)
◽
pp. 135-138
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1969 ◽
pp. 1797
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Keyword(s):