AbstractThe title compound crystallizes in space group P 21/c of the monoclinic system in a cell of dimensions: a = 9.231(2), b = 15.931(2), c = 12.420(2) Å, β = 108.37(1)°. The observed density is 1.60 g/cm3and the density calculated for four molecules in the cell is 1.58 g/cm3. The refinement converged with R = 0.029 and Rw= 0.028 based on 2569 reflections with I>2.5 σ. The molecule has approximate Cssymmetry with a mirror plane roughly containing the central Mo atom and twocis‐carbonyls, C(1)O(1) and C(4)O(4), while bisecting the bidentate, H2CPz2, and twotrans‐carbonyls. The four carbonyls and tine bidentate adopt aquasi‐octahedral arrangement around the Mo atom. The C(NN)2Mo linkage of the (H2CPz′2)Mo fragment is observed to be in the boat form. The twocis‐carbonyls are bent away by the bulky H2CPz′2bidentate giving ∠C(1)‐Mo‐C(4) ≃ 167.3(1)°. The distortion explains the facile allyl bromination and decarbonylation observe