allery[MnBr₄]²⁻ has a spin-only magnetic moment of 5.9 BM. What is its geometry?
ATetrahedral
BSee-saw shaped
CSquare planar
DOctahedral
Answer & Solution
Correct answer: A. Tetrahedral
5.9 BM matches five unpaired electrons, so no d orbital is free for dsp², and the four-coordinate ion must be sp³ tetrahedral.
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