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Pyridine-3-carboxamidinium chloride.

ABSTRACT: The title compound, C(6)H(8)N(3) (+)·Cl(-), crystallizes with two formula units in the asymmetric unit. The cations are non-planar with the -C(NH(2))(2) groups twisted relative to the ring planes by 36.7 (3) and 37.8 (3)°. The cations are linked into chains through N-H⋯N hydrogen bonds. N-H⋯Cl hydrogen bonds link the chains into a three-dimensional network.

SUBMITTER: Liu F

PROVIDER: S-EPMC3099956 | biostudies-literature | 2011 Apr

REPOSITORIES: biostudies-literature

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Pyridine-3-carboxamidinium chloride.

Liu Fei F Zhang Fang F Chen Qifan Q Zhang Huidong H

Acta crystallographica. Section E, Structure reports online 20110305 Pt 4

The title compound, C(6)H(8)N(3) (+)·Cl(-), crystallizes with two formula units in the asymmetric unit. The cations are non-planar with the -C(NH(2))(2) groups twisted relative to the ring planes by 36.7 (3) and 37.8 (3)°. The cations are linked into chains through N-H⋯N hydrogen bonds. N-H⋯Cl hydrogen bonds link the chains into a three-dimensional network. ...[more]

PMID: 21754072

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Pyridine-4-carboximidamidate chloride.

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Pyridine-2-carboximidamidate chloride monohydrate.

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Crystal structure of [3-amino-2-(phenyl-diazenyl)-pyridine]chlorido-(η(6)-p-cymene)-ruthenium(II) chloride.

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Manganese(II) chloride complexes with pyridine <i>N</i>-oxide (PNO) derivatives and their solid-state structures.

Project description:Three manganese(II) N-oxide complexes have been synthesized from the reaction of manganese(II) chloride with either pyridine N-oxide (PNO), 2-methyl-pyridine N-oxide (2MePNO) or 3-methyl-pyridine N-oxide (3MePNO). The compounds were synthesized from methano-lic solutions of MnCl2·4H2O and the respective N-oxide, and subsequently characterized structurally by single-crystal X-ray diffraction. The compounds are catena-poly[[aqua-chlorido-manganese(II)]-di-μ-chlorido-[aqua-chlorido-manganese(II)]-bis-(μ-pyridine N-oxide)], [MnCl2(C5H5NO)(H2O)] n or [MnCl2(PNO)(H2O)] n (I), catena-poly[[aqua-chlorido-man-gan-ese(II)]-di-μ-chlorido-[aqua-chlorido-manganese(II)]-bis-(μ-2-methyl-pyridine N-oxide)], [MnCl2(C6H7NO)(H2O)] n or [MnCl2(2MePNO)(H2O)] n (II), and bis-(μ-3-methyl-pyridine N-oxide)bis-[di-aqua-dichlorido-manganese(II)], [Mn2Cl4(C6H7NO)2(H2O)4] or [MnCl2(3MePNO)(H2O)2]2 (III). The MnII atoms are found in pseudo-octa-hedral environments for each of the three complexes. Compound I forms a coordination polymer with alternating pairs of bridging N-oxide and chloride ligands. The coordination environment is defined by two PNO bridging O atoms, two chloride bridging atoms, a terminal chloride, and a terminal water. Compound II also forms a coordination polymer with a similar metal cation; however, the coordination polymer is bridged between MnII atoms by both a single chloride and 2MePNO. The distorted octahedrally coordinated metal cation is defined by two bridging 2MePNO trans to each other, two chlorides, also trans to one another in the equatorial (polymeric) plane, and a terminal chloride and terminal water. Finally, complex III forms a dimer with two bridging 3MePNOs, two terminal chlorides and two terminal waters forming the six-coordinate metal environment. All three compounds exhibit hydrogen bonding between the coordinating water(s) and terminal chlorides.

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Crystal structures of tris-[1-oxo-pyridine-2-olato(1-)]silicon(IV) chloride chloro-form-d 1 disolvate, tris-[1-oxo-pyridine-2-olato(1-)]silicon(IV) chloride aceto-nitrile unqu-anti-fied solvate, and fac-tris-[1-oxo-pyridine-2-thiol-ato(1-)]silicon(IV) chloride chloro-form-d 1 disolvate.

Project description:The cations in the title salts, [Si(OPO)3]Cl·2CDCl3, (I), [Si(OPO)3]Cl·xCH3CN, (II), and fac-[Si(OPTO)3]Cl·2CDCl3, (III) (OPO = 1-oxo-2-pyridin-one, C5H4NO2, and OPTO = 1-oxo-2-pyridine-thione, C5H4NOS), have distorted octa-hedral coordination spheres. The first two structures contain the same cation and anion, but different solvents of crystallization led to different solvates and packing arrangements. In structures (I) and (III), the silicon complex cations and chloride anions are well separated, while in (II), there are two C-H?Cl distances that fall just within the sum of the van der Waals radii of the C and Cl atoms. The pyridine portions of the OPO ligands in (I) and (II) are modeled as disordered with the planar flips of themselves [(I): 0.574?(15):0.426?(15), 0.696?(15):0.304?(15), and 0.621?(15):0.379?(15); (II): 0.555?(13):0.445?(13), 0.604?(14):0.396?(14) and 0.611?(13):0.389?(13)], demonstrating that both fac and mer isomers are co-crystallized. In (II), highly disordered solvent, located in two independent channels along [100], was unable to be modeled. Reflection contributions from this solvent were fixed and added to the calculated structure factors using the SQUEEZE [Spek (2015 ?). Acta Cryst. C71, 9-18] function of program PLATON, which determined there to be 54 electrons in 225?Å(3) accounted for per unit cell (25 electrons in 109?Å(3) in one channel, and 29 electrons in 115?Å(3) in the other). In (I) and (II), all species lie on general positions. In (III), all species are located along crystallographic threefold axes.

| S-EPMC4719831 | biostudies-other

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