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Three complexes,(PBT)W(CO)5(1),(3,5-Me2PBT)W(CO)5(2) and(3,5-Pri2PBT)W(CO)5(3)(PBT=1H-(pyrazol-1-ylmethyl)-1,2,3-benzotriazole),were synthesized,and two of them were structurally characterized by X-ray crystallography.Complex 1 crystallizes in monoclinic