The title compound, C(20)H(32)N(2)O(2)S, the condensation product of a thio-acetohydrazine and acetone, has a two-coordinate S atom and the angle at this atom is 100.7 (1)°. The (CH(3))C=N-NH-C(O)- substituent engages in N-H⋯O hydrogen-bonding inter-actions with the substituent of an adjacent mol-ecule across a center of inversion, generating a dimeric structure.
In the title compound, C(10)H(7)N(3)O(3), the dihedral angle between the two aromatic rings is 87.5 (1) Å; their ipso-C atoms subtend an angle of 117.4 (1)° at the ether O atom.
The Sn(IV) atom in the title compound, [Sn(C(7)H(6)Cl)(3)Cl(C(18)H(15)AsO)], shows a distorted C(3)ClOSn trigonal bipyramidal coordination; the axial O-Sn-Cl angle is 170.22 (4)°.
In the crystal structure of the title compound, [VO(C(7)H(6)ClN(2)O)(C(10)H(7)ClN(2)O(3))], the V(V) atom is N,O-chelated by the chloro-benzoyl-hydrazidate anion and O,N,O'-chelated by the (chloro-benzoyl-hydrazono)propionate dianion. The distorted octa-hedral trans-N(2)O(4) coordination geometry is completed by the vanadyl O atom. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds into a linear chain parallel to [010].
In the crystal structure of the title compound, [Sn(C(7)H(6)Cl)(2)Cl(2)(C(12)H(8)N(2))], the Sn(IV) atom is chelated by the N-heterocycle and the metal atom exists in a trans-C(2)SnCl(2)N(2) distorted octa-hedral coordination environment.
The Sn atom in the title compound, [Sn(C(7)H(7))(2)(C(5)H(5)N(2)O)Cl], shows a distorted C(2)ClNOSn trigonal-bipyramidal coordin-ation, with a Cl-Sn-O axial angle of 163.77 (3)°, but the C-Sn-C angle [141.43 (7)°] deviates from 120°. The chelating ligand exists in a zwitterionic form. Adjacent molecules are linked by an N-H(pyridinium)⋯O hydrogen bond, forming a chain running along the c axis of the orthorhombic unit cell.
In the title compound, C(10)H(9)ClN(2)O(3)·H(2)O, the water mol-ecule is a hydrogen-bond donor to the amide and carbonyl O atoms of two acid mol-ecules; it is also a hydrogen-bond acceptor to the acid OH group and the amide H atom. The hydrogen-bonding inter-actions give rise to a two-dimensional array.
The five-coordinate Sn atom in the title salt, [(CH(3))(3)(C(6)H(6))N][SnBr(2)(C(6)H(5))(3)], exists in a distorted trans-C(3)SnBr(2) trigonal-bipyramidal coordination geometry. In the crystal structure no obvious hydrogen bonding is observed.
The title imidazolium-based ionic-liquid salt, C(18)H(24)N(4) (2+)·2PF(6) (-), has the cation lying about a center of inversion. The five-membered imidazole ring is disordered over two positions (the methyl substituents are ordered). This imidazole ring is approximately perpendicular to the six-membered phenyl-ene ring [dihedral angle = 81.3 (8)° for one disorder component and 83.8 (8)° for the other; the two components are off-set by 2.7 (8)°]. The crystal is a non-merohedral twin with a twin component of 23%.
The title imidazolium-based ionic-liquid salt, C(18)H(24)N(4) (2+)·2BF(4) (-), has the cation lying about a center of inversion. The five-membered imidazole ring is approximately perpendicular to the six-membered phenyl-ene ring [dihedral angle = 86.9 (1)°]. The tetra-fluoro-borate anion is disordered over two sites in a 0.722 (3):0.278 (3) ratio.
The title imidazolium-based ionic-liquid salt, C(18)H(24)N(4) (2+)·2Br(-), has the cation lying about a center of inversion. The five-membered imidazole ring is disordered over two positions with the major component having a site occupancy of 0.712 (4); the N-bound methyl substituents are ordered. The imidazole ring is approximately perpendicular to the six-membered phenyl-ene ring [dihedral angle = 80.7 (5)° for the major disorder component and 89.8 (3)° for the other; the two components are off-set by 10.1 (6)°].
In the title compound, C(11)H(10)N(2)O, the aromatic rings make a dihedral angle of 76.3 (1)°. The C-O-C angle at the ether atom is widened to 117.79 (9)°.
In the title compound, C(10)H(9)N(3)O, the organic rings linked to the ether O atom make a dihedral angle of 76.8 (1)° and the C-O-C angle is widened to 119.07 (15)°. In the crystal, adjacent mol-ecules are connected by an N-H⋯N hydrogen bond, generating a chain running parallel to the b axis. The crystal is a non-merohedral twin with a ratio of twin components of 0.508 (3):0.492 (3).
The title compound, C(11)H(10)N(2)O, crystallizes with two mol-ecules in the asymmetric unit. The angle at the ether O atom is widened to 118.13 (15)° [117.89 (16)° for the second mol-ecule in the asymmetric unit]; the six-membered rings subtend a dihedral angle of 84.3 (1)° [87.4 (1)° in the second mol-ecule].
In the title tetra-nuclear tin(IV) complex, [Sn(4)(CH(3))(8)(C(20)H(22)N(2)O(4))Cl(2)O(2)], there are three completely different tin-atom coordinations. One metal atom (site symmetry 2) adopts a distorted penta-gonal-bipyramidal SnC(2)N(2)O(3) coordination arising from the N,N',O,O'-tetra-dentate deprotonated Schiff base, two methyl groups in the axial sites and a μ(3)-O atom that also bonds to two further Sn atoms. Two symmetry-equivalent Sn atoms adopt very distorted SnC(2)O(4) arrangements that could be described as penta-gonal-bipyramidal with one equatorial vertex missing and the C atoms in the axial site. The final Sn atom (site symmetry 2) adopts an SnC(2)Cl(2)O trigonal-bipyramidal arrangement, with Cl atoms in the axial sites. As well as the two Sn atoms, one O atom lies on a twofold rotation rotation axis, and another is disordered about the axis. The terminal eth-oxy group is disordered over two sets of sites with equal occupancy.
The Sn(IV) atom in the title compound, [Sn(C(7)H(6)Cl)(2)Cl(2)(C(12)H(12)N(2))], is coordinated by the bidentate N-heterocycle mol-ecule, two chloro-benzyl anions and two Cl(-) anions in a distorted trans-C(2)SnCl(2)N(2) octa-hedral geometry [C-Sn-C = 178.4 (1)°]. In the mol-ecular structure, the two benzene rings are oriented at a dihedral angle of 39.62 (17)°.
Crystallization of the ionic liquid 3,3'-dimethyl-1,1'-(1,4-phenylenedimethylene)diimidazolium bis(tetrafluoroborate), C(16)H(20)N(4)(2+).2BF(4)(-), (I), from its solution in water has permitted the first single-crystal study of an imidazolium-based ionic liquid having a tetrafluoroborate ion as counter-ion. Despite the expectation that the anion would not participate in nonclassical hydrogen bonding, the ionic liquid features C-H...F hydrogen bonds. The dication lies about a center of inversion. The ionic liquid 3,3'-di-n-butyl-1,1'-(1,4-phenylenedimethylene)diimidazolium bis(trifluoromethanesulfonate), C(22)H(32)N(4)(2+).2CF(3)SO(3)(-), (II), features both C-H...F and C-H...O hydrogen bonds.
The asymmetric unit of the crystal structure of the title compound, [Sn(C(7)H(6)Cl)(2)Cl(2)(C(20)H(14)N(4))], contains two independent mol-ecules. Each Sn(IV) atom is chelated by the bipyridine-like N-heterocycle and exists in a distorted trans-C(2)SnCl(2)N(2) octa-hedral coordination environment. One chloro-benzyl substituent is disordered in each mol-ecule in 0.5:0.5 and 0.778 (2):0.222 (2) ratios.
The Sn atom in the title substituted pyridinium stannate bromo-3,4-dichloro-benzene solvate, (C(7)H(11)N(2))(2)[SnBr(4)(C(6)H(3)Cl(2))(2)]·C(6)H(3)BrCl(2), lies on a twofold axis within an octa-hedral C(2)Br(4) donor set. Each cation forms an N-H⋯Br hydrogen bond to one of the Br atoms of the anion. The solvent mol-ecule is disordered about the twofold rotation axis with equal occupancy. The crystal under investigation was non-merohedrally twinned, with a twin component ratio of 0.76:0.24.
In the title compound, (C(7)H(11)N(2))(2)[SnBr(5)Cl], there is Br/Cl disorder in 0.6561 (12):0.3439 (12) and 0.8438 (12):0.1561 (12) ratios over two of three halide sites in the centrosymmetric anion, such that an overall formulation of [SnBr(5)Cl](2-) arises. In the crystal, associations of two cations and one anion linked by N-H⋯Br hydrogen bonds occur.