A) \[R{{S}^{\Theta }}\]is less basic but more nucleophilic than \[R{{O}^{\Theta }}.\]
B) \[R{{S}^{\Theta }}\]is more basic and more nucleophilic than \[R{{O}^{\Theta }}.\]
C) \[R{{S}^{\Theta }}\]is more basic but less nucleophilic than \[R{{O}^{\Theta }}.\]
D) \[R{{S}^{\Theta }}\]is less basic and less nucleophilic than \[R{{O}^{\Theta }}.\]
Correct Answer: C
Solution :
\[R{{S}^{\Theta }}\]is more nucleophilic than \[R-{{O}^{\Theta }}\]\[R{{S}^{\Theta }}\]due to larger size of orbitals and polarization but RS is less basic than \[R-{{O}^{\Theta }}\]as the negative charge get stabilized due to larger size of sulphur atom.
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