Dimethyl-2,2'-bipyridine

Dimethyl-2,2'-bipyridine can refer to many isomers of 2,2'-bipyridine containing two methyl substituents. All have the formula (CH3)2C10H6N2, but the most common are symmetrical derivatives (CH3C5H3N)2 listed below. These compounds are used as ligands in coordination chemistry and homogeneous catalysis. They are white or colorless. Most are solids except the 3,3' isomer which is a liquid.

Structure of 4,4'-dimethyl-2,2'-bipyridine.
Caption text
compound Registry number melting/boilingpoint (°C)
4,4'-dimethyl-2,2'-bipyridine 1134-35-6 171-172
5,5'-dimethyl-2,2'-bipyridine 1762-34-1 114.5-115
6,6'-dimethyl-2,2'-bipyridine 4411-80-7 89.5-90.5
3,3'-dimethyl-2,2'-bipyridine 1762-32-9 293-298[1]

References

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  1. ^ Case, Francis H. (1946). "The Synthesis of Certain Substituted 2,2'-Bipyridyls1". Journal of the American Chemical Society. 68 (12): 2574–2577. doi:10.1021/ja01216a045.