Among the following molecules, N-Si bond length is shortest in:
(a) N(SiH3)3
(b) N(SiH3)2
(c) NH2(SiH3)
(d) All have equal N-Si bond length
To determine the shortest N-Si bond length among the given molecules, let's analyze the structures of each option:
(a) N(SiH3)3: This molecule has three SiH3 groups bonded to a central nitrogen atom.
(b) N(SiH3)2: This molecule has two SiH3 groups bonded to a central nitrogen atom.
(c) NH2(SiH3): This molecule has one SiH3 group and one NH2 group bonded to a central nitrogen atom.
In general, the more SiH3 groups attached to the nitrogen atom, the shorter the N-Si bond lengths tend to be. This is because the SiH3 groups are electron-withdrawing, which leads to stronger N-Si bonds. Therefore, option (a) N(SiH3)3 is likely to have the shortest N-Si bond length among the given options.
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