A novel cyano complex of tungsten(IV) with 2, 2?-bipyridyl

Heptacoordinated W(IV) Cyanido Supramolecular Complex Trapped by Photolysis of a [W(CN)6(bpy)]2–/Zn2+ System

“…All other solvents were of analytical grade (Aldrich) and were used as supplied. (PPh 4 ) 2 [W­(CN) 6 (bpy)]­·4H 2 O was synthesized using a literature method. ,,, AsPh 4 [W­(CN) 6 (bpy)] was synthesized as described earlier …”

“…(PPh 4 ) 2 [W(CN) 6 (bpy)]•4H 2 O was synthesized using a literature method. 1,3,48,49 AsPh 4 [W(CN) 6 (bpy)] was synthesized as described earlier. 3 Synthesis of PPh 4 [W(CN) 6 (bpy)].…”

“…The photochemistry of cyanido complexes of transition metals could be divided into substitutional (within d–d transition region) or redox (in charge-transfer, CT, region). In the case of the hexacyanido complex of tungsten, it was found that the primary photolysis of [W­(CN) 6 (bpy)] − (bpy denotes 2,2′-bipyridine) results in W­(V) reduction to W­(IV) with preserving the anion structure. − The prolonged photolysis or photolysis of [W­(CN) 6 (bpy)] 2– results in bpy molecule release in the first step. After bpy release, it is believed that the sequence of processes occur, depending on pH.…”

Oxocyano complexes of molybdenum(IV) and tungsten(IV) with Schiff base ligands derived from salicylaldehyde and aliphatic amines. Crystal structure of [PPh4]2[Mo(CN)3O(ensal)]·5.5H2O (Hensal = N-salicylideneethylenediamine)

“…When a methanolic solution of salicylaldehyde is added to a neutral aqueous solution of [Mo(CN) 4 O(H 2 O)] 2Ϫ the originally blue colour of the latter changes to green as a result of the co-ordination of the aldehyde. 15 After addition of methylamine a relatively stable compound is formed, which can be isolated as a tetraphenylphosphonium salt. Elemental analysis of the product coincides with the formula…”

Basket weave-like 2-D coordination polymer generated by the self-assembly of [Mn(H2O)6]2+and geometrically anisotropic [W(CN)6bpy]2−precursors

“…1 These observations prompted us to explore the possibility of lowering the symmetry of the octacoordinated cyano building block by using the molecular precursor related to the octacyanotungstate(IV) -the geometrically anisotropic [W(CN) 6 bpy] 22 (bpy ~2,2'-bipyridyl) complex. 3 Our strategy is convergent with the new synthetic approach based on the replacement of a highly symmetrical [Fe(CN) 6 ] 32 by lower symmetry [Fe(CN) 4 (phen)] 2 . 4 In [W(CN) 6 bpy] 22 , which is not compatible with the cubic geometry of hexacyano moieties, two coordination sites are occupied by the bpy ligand acting as a terminal coordinator and participating in secondary p-stacking interactions.…”