In which of the following is a dative bond NO | vedclass

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(D) dative bond (coordinate covalent bond) is not involved in the dimerisation of benzoic acid. In the dimerisation of benzoic acid,two molecules are

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Dimerisation of benzoic acid

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(D) dative bond (coordinate covalent bond) is not involved in the dimerisation of benzoic acid. In the dimerisation of benzoic acid,two molecules are held together by intermolecular $H$-bonding. In the protonation of ether $(R-O-R + H^+ \rightarrow R-O^+(H)-R)$,a dative bond exists between the oxygen atom of the ether and the $H^+$ ion. When $HCl$ dissolves in water,it forms $H_3O^+$,which contains a dative bond between the oxygen of water and the $H^+$ ion. In the dimerisation of $BeCl_2$,dative bonds are formed by the donation of lone pairs from chlorine atoms of one $BeCl_2$ molecule to the electron-deficient $Be$ atom of another $BeCl_2$ molecule.

In which of the following is a dative bond $NOT$ present?

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