Question

The cage-type structure adopted by boron hydride, [B5H11] is

• A. closo
• B. nido
• C. hypo
• D. arachno

Hint:

Boron hydrides can adopt different types of cage structures based on the number of vertices involved. Nido structures have 4 vertices.

Answer 1

The Correct Option is D

Step 1: Understanding boron hydride structures.
The structure of boron hydrides can be classified as closo, nido, hypo, or arachno depending on the number of vertices and the bonding. The cage structure of [B5H11] is classified as nido.

Step 2: Analyzing the options.
(B) Correct: The correct structure is nido, which refers to a structure with 4 vertices.
(A), (C), (D): Incorrect, these terms refer to other types of boron hydride structures.

Step 3: Conclusion.
The correct answer is (B).