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Title: Synthesis and Structural Features of [4,4'-Diisopropoxyester-2,2'-bipyridine], [Dichloro(4,4'-diisopropoxyester-2,2'-bi-pyridine)-platinum(ii)] and Its Dichloromethane Solvated Pseudo-Polymorph: Versatile Supramolecular Interactions

We report that the organic ligand 4,4'-diisopropoxyester-2,2'-bipyridine, C18H20N2O4 (1), crystallizes in the triclinic crystal system P-1 and the molecule occupies a special position in the unit cell. In the crystal, molecules form stacks with partial overlapping of the pyridine rings. The Pt(II) dichloro complex of 1 crystallizes from a mixture of ethanol/hexane and from dichloromethane to form orange and yellow crystals, respectively. The orange non-solvated crystals of the (bipyridine)(dichloro)platinum(II) complex C18H20N2O4PtCl2 (2) crystallize in the triclinic crystal system P-1 as well with two independent molecules in the unit cell. In the crystal packing, molecules form two types of dimers with Pt1 ··· Pt1A and Pt2···Pt2A distances of 3.478 and 5.186 angstrom respectively. The yellow crystals, as a solvated pseudo-polymorph C18H20N2O4PtCl2·1.5 CH2Cl2 (3) also crystallize in the triclinic crystal system P-1 with two independent molecules in the unit cell. In the crystal packing, molecules form Pt2 ···Pt1 ···Pt1A ···Pt2A intermolecular contacts with alternating distances 3.501 and 3.431 angstrom, respectively, forming infinite chains. Graphical Abstract The dichloro(bipyridine)platinum complex, dichloro(4,4'-diisopropoxyester-2,2'-bipyridine)platinum(II), forms single crystals as a stable non-solvated form and a solvated polymorph with dramatically different supramolecular structure and short contacts.
Authors:
 [1] ;  [1] ;  [2] ;  [1]
  1. Univ. of North Texas, Denton, TX (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical and Engineering Materials Division
Publication Date:
OSTI Identifier:
1261444
Grant/Contract Number:
AC05-00OR22725; CHE-1413641; CHE-0911690; CMMI-0963509; CHE-0840518; B-1542
Type:
Accepted Manuscript
Journal Name:
Journal of Chemical Crystallography
Additional Journal Information:
Journal Volume: 45; Journal Issue: 6; Journal ID: ISSN 1074-1542
Publisher:
Springer
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY X-ray diffraction; [4; 4 '-diisopropoxyester-2; 2 '-bipyridine]; [dichloro(4; 4 '-diisopropoxyester-2; 2 '-bipyridine)-platinum(II)] Supramolecular interactions; Pseudo-polymorphism; ELECTRONIC-STRUCTURE; DIIMINE COMPLEXES; ACCEPTORS