Q30 of 66 Page 149

Show the polarisation of carbon-magnesium bond in the following structure.

CH3—CH2—CH2—CH2—Mg—X


When we compare the electronegativity of carbon and Magnesium we observe C is more electronegative than Mg, because of this electronegativity difference the bond between C-Mg is highly polarised. C being more electronegative the electron density is towards C hence Mg readily loses its electron to form C-( carbanion).

CH3—CH2—CH2—δ-CH2—δ+Mg+ X-


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