title: 2,9-Dimethyl-1,10-phenanthrolin-1-ium (6-carb-oxy-4-hy-droxy-pyridine-2-carboxyl-ato-κO,N,O)(4-hy-droxy-pyridine-2,6-dicarboxyl-ato-κO,N,O)nickelate(II) 2.35-hydrate: a proton-transfer compound.
abstract: The title proton-transfer compound, (C(14)H(13)N(2))[Ni(C(7)H(3)NO(5))(C(7)H(4)NO(5))]·2.35H(2)O, consists of an [Ni(hypydc)(hypydcH)](-) anion, a dmpH(+) cation and 2.35 uncoordinated water mol-ecules (where hypydcH(2) = 4-hy-droxy-pyridine-2,6-dicarb-oxy-lic acid and dmp = 2,9-dimethyl-1,10-phenanthroline). The Ni(II) atom is coordinated by two N atoms and four O atoms from the carboxyl-ate groups of the (hypydc)(2-) and (hypydcH)(-) ligands, forming a distorted octa-hedral environment. In the anion, the two pyridine rings are inclined to one another by 89.24 (10)°. In the crystal, cations are linked via O-H⋯O hydrogen bonds forming dimers, graph-set [R(2) (2)(16)], centered about inversion centers. These dimers are further linked by other cation O-H⋯O hydrogen bonds, graph-set [R(6) (6)(42)], forming a two-dimensional network in (011). Additional inter-molecular O-H⋯O, N-H⋯O, N-H⋯N, and weak C-H⋯O hydrogen bonds, and π-π inter-actions [shortest centroid-centroid distance = 3.5442 (14) Å], connect the two dimensional networks, forming a three-dimensional arrangement. The H atoms of one of the methyl groups are disordered over two sites with equal occupancy.
authors: Maryam
authors: M
authors: Derakhshandeh
authors: Zohreh
authors: Z
authors: Derikvand
authors: Andya
authors: A
authors: Nemati
authors: Helen
authors: H
authors: Stoeckli-Evans
references: Acta Crystallogr Sect E Struct Rep Online. 2009 Oct 17;65(Pt 11):m1374-5
references: 21578125
references: Acta Crystallogr Sect E Struct Rep Online. 2008 Aug 30;64(Pt 9):m1208-9
references: 21201644
references: Acta Crystallogr Sect E Struct Rep Online. 2008 Aug 16;64(Pt 9):m1173-4
references: 21201618
references: Acta Crystallogr Sect E Struct Rep Online. 2008 Sep 20;64(Pt 10):m1300-1
references: 21201040
references: Acta Crystallogr D Biol Crystallogr. 2009 Feb;65(Pt 2):148-55
references: 19171970
references: Acta Crystallogr Sect E Struct Rep Online. 2007 Dec 12;64(Pt 1):m144-5
references: 21200499
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677
references: Acta Crystallogr Sect E Struct Rep Online. 2008 Feb 13;64(Pt 3):m466-7
references: 21201857