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The molecules having dipole moment are _______ |
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Answer» 2,2-Dimethylpropane  Since the +I-effect of `CH_3CH_2` group is higher than that of `CH_3` group, therefore , the dipole moments of `C-CH_3` and `C-CH_2CH_3` BONDS are unequal . Although these two dipoles oppose each other, YET they do not exactly cancel out each other and HENCE trans-2-pentene has small but finite dipole moment.In cis-hex-3-ene , although the dipole moment of the two `C-CH_2CH_3` bonds are equal , they are inclined to each other at angle of `60^@` and hence have a finite resultant. Further, 2,2-dimethylpropane and 2,2,3,3-tetramethylbutane have zero dipole moments because of the following two reasons : (i)C-C and C-H bonds in alkanes are almost non-polar and have no FIXED orientations in SPACE , therefore, their resultant dipole moment, if any , are almost negligible . (ii)Both these are symmetricalmolecules and hence their dipole moments is zero. |
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