Chemistry - CHEMICAL BONDING Question with Solution | TestHub

Oxygen lone-pair donation into empty boron p orbitals in B(OCH₃)₃ gives B-O partial π character and alters the local B-O-C angle, A. The silicon compounds use a different classical donor-acceptor description. BF₃ also has pπ-pπ donation, but trigonal symmetry keeps its F-B-F angle at 120°, so it does not satisfy the stated angle-change condition. Answer A.