Which of the following has the lowest dipole | vedclass

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(B) The dipole moment depends on the molecular symmetry and the polarity of bonds. $1$. $CH_3-C \equiv C-CH_3$ (but$-2-$yne) is a linear and symmetric

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$CH_3-C \equiv C-CH_3$

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(B) The dipole moment depends on the molecular symmetry and the polarity of bonds. $1$. $CH_3-C \equiv C-CH_3$ (but$-2-$yne) is a linear and symmetrical molecule. Due to its high symmetry,the dipole moments of the $C-CH_3$ bonds cancel each other out,resulting in a net dipole moment of zero. $2$. $CH_3-CH_2-C \equiv CH$ (but$-1-$yne) and $CH_2=CH-C \equiv CH$ (but$-1-$en$-3-$yne) are asymmetric,leading to a non-zero net dipole moment. $3$. cis-but$-2-$ene has a non-zero dipole moment due to its polar nature and lack of center of symmetry. Therefore,$CH_3-C \equiv C-CH_3$ has the lowest dipole moment.

Which of the following has the lowest dipole moment?

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