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Each central platinum(II) atom in the crystal structures of chlorido-[dihy-droxybis-(1-imino-eth-oxy)arsanido-κ 3  N , As , N ']platinum(II), [Pt(C 4 H 10 AsN 2 O 4 )Cl] ( 1 ), and of chlorido-[dihy-droxybis-(1-imino-prop-oxy)arsanido-κ 3  N , As , N ']platinum(II), [Pt(C 6 H 14 AsN 2 O 4 )Cl] ( 2 ), is coordinated by two nitro-gen donor atoms, a chlorido ligand and to arsenic, which, in turn, is coordinated by two oxygen donor ligands, two hydroxyl ligands and the platinum(II) atom. The square-planar and trigonal-bipyramidal coordination environments around platinum and arsenic, respectively, are significantly distorted with the largest outliers being 173.90 (13) and 106.98 (14)° for platinum and arsenic in ( 1 ), and 173.20 (14)° and 94.20 (9)° for ( 2 ), respectively. One intra-molecular and four classical inter-molecular hydrogen-bonding inter-actions are observed in the crystal structure of ( 1 ), which give rise to an infinite three-dimensional network. A similar situation (one intra-molecular and four classical inter-molecular hydrogen-bonding inter-actions) is observed in the crystal structure of ( 2 ). Various π-inter-actions are present in ( 1 ) between the platinum(II) atom and the centroid of one of the five-membered rings formed by Pt, As, C, N, O with a distance of 3.7225 (7) Å, and between the centroids of five-membered (Pt, As, C, N, O) rings of neighbouring mol-ecules with distances of 3.7456 (4) and 3.7960 (6) Å. Likewise, weak π-inter-actions are observed in ( 2 ) between the platinum(II) atom and the centroid of one of the five-membered rings formed by Pt, As, C, N, O with a distance of 3.8213 (2) Å, as well as between the Cl atom and the centroid of a symmetry-related five-membered ring with a distance of 3.8252 (12) Å. Differences between ( 2 ) and the reported polymorph [Miodragović et al. (2013 ▸). Angew. Chem. Int. Ed.  52 , 10749-10752] are discussed.

acta crystallographica. section e, crystallographic communications

Crystal structures of chlorido[dihydroxybis(1-iminoethoxy)]arsanido-κ3 N,As,N′]platinum(II) and of a polymorph of chlorido[dihydroxybis(1-iminopropoxy)arsanido-κ3 N,As,N′]platinum(II)