catena-Poly[[[diaqua­(nitrato-κ(2) O,O′)(2,2′:6′,2′′-terpyridine-κ(3) N,N′,N′′)neodymium(III)]-μ-cyanido-κ(2) N:C-[dicyanidoplatinum(II)]-μ-cyanido-κ(2) C:N] acetonitrile solvate 2,2′:6′,2′′-terpyridine hemisolvate]

The title compound, {[NdPt(CN)(4)(NO(3))(C(15)H(11)N(3))(H(2)O)(2)]·CH(3)CN·0.5C(15)H(11)N(3)}(n), was isolated from solution as a one-dimensional coordination polymer. The Nd(3+) site in the structure has a ninefold coordination with a distorted tricapped trigonal-prismatic geometry, while the Pt(II) ion is coordinated by four cyanide groups in an almost regular square-planar geometry. Cis-bridging by the tetracyanidoplatinate anions links the Nd(3+) cations, forming the one-dimensional chains. Additionally, each Nd(3+) contains coordin­ation by two water mol­ecules, one tridentate 2,2′:6′,2′′-terpyridine mol­ecule, and one bidentate nitrate anion. 2,2′:6′,2′′-Terpyridine and acetonitrile solvent mol­ecules are incorporated between the chains, the former form π-stacking inter­actions (average inter­planar distance 3.33 Å) with terpyridine mol­ecules located in the chains. Relatively long Pt⋯Pt inter­actions [3.847 (1) Å] are observed in the structure. O—H⋯N and O—H⋯O hydrogen bonding interactions between the consituents consolidates the crystal packing.