منابع مشابه
1855 On
Wallace, A. R. 1855. On the law which has regulated the introduction of new species.
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The free energies of activation for the aryl–aryl rotation of 17 biphenyl derivatives, bearing a heavy heteroatom (S, Se, Te, P, Si, Sn) as ortho substituent, have been measured by variable temperature NMR. These numbers, so called B values, represent a meaningful measure of the steric hindrance exerted by the selected substituents. DFT computations match quite satisfactorily the experimental b...
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ژورنال
عنوان ژورنال: BMJ
سال: 1856
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.s3-4.160.66-a