scholarly journals Crystal structure of bis{N′-[(E)-4-hydroxybenzylidene]pyridine-4-carbohydrazide-κN1}diiodidocadmium methanol disolvate

Author(s):  
Farhad Akbari Afkhami ◽  
Harald Krautscheid ◽  
Zeliha Atioğlu ◽  
Mehmet Akkurt

In the title compound, [Cd(C13H11IN3O2)2]·2CH3OH, which crystallizes withZ= 4 in the space groupPbcn, the CdIIatom is located on a twofold rotation axis and coordinated by two I−anions and two N atoms from the pyridine rings of the twoN′-[(E)-4-hydroxybenzylidene]pyridine-4-carbohydrazide ligands. The geometry around the CdIIatom is distorted tetrahedral, with bond angles in the range 94.92 (11)–124.29 (2)°. The iodide anions undergo intermolecular hydrogen-bonding contacts with the C—H groups of the organic ligands of an adjacent complex molecule, generating a chain structure along thebaxis. Furthermore, an extensive series of O—H...O, N—H...O and C—H...O hydrogen-bonding interactions involving both the complex molecules and the ethanol solvate molecules generate a three-dimensional network.

Author(s):  
Yukiko Yamaguchi-Terasaki ◽  
Takashi Fujihara ◽  
Akira Nagasawa ◽  
Sumio Kaizaki

In the neutral complex molecule of the title compound,fac-[CrCl3(tpa)] [tpa is tris(pyridin-2-yl)amine; C15H12N4], the CrIIIion is bonded to three N atoms that are constrained to afacialarrangement by the tpa ligand and by three chloride ligands, leading to a distorted octahedral coordination sphere. The average Cr—N and Cr—Cl bond lengths are 2.086 (5) and 2.296 (4) Å, respectively. The complex molecule is located on a mirror plane. In the crystal, a combination of C—H...N and C—H...Cl hydrogen-bonding interactions connect the molecules into a three-dimensional network.


2012 ◽  
Vol 68 (4) ◽  
pp. o964-o965 ◽  
Author(s):  
Amna Qasem Ali ◽  
Naser Eltaher Eltayeb ◽  
Siang Guan Teoh ◽  
Abdussalam Salhin ◽  
Hoong-Kun Fun

In the title compound, C10H9ClN4OS, an intramolecular N—H...O hydrogen-bonding interaction and an N—H...N interaction generate ring motifs [graph setsS(6) andS(5), respectively]. In the crystal, molecules form a chain through N—H...O hydrogen bonds, and these are extended by N—H...S hydrogen-bonding interactions into an infinite three-dimensional network. The crystal structure also exhibits weak C—H...π interactions.


2014 ◽  
Vol 70 (9) ◽  
pp. 142-144 ◽  
Author(s):  
Jiyong Liu

In the title compound, [Cd(CH3COO)2(C6H7N3O)2]·2C2H5OH, the CdIIatom, which lies on a twofold rotation axis, is coordinated by two monodentate acetate groups and twoN,N′-chelating pyridine-2-carboxamide oxime ligands, leading to a distorted octahedral coordination sphere. The mononuclear complex molecules are assembled into chains along thec-axis directionviaN—H...O hydrogen-bonding interactions. These chains are further assembled by O—H...O hydrogen bonds involving the ethanol solvent molecules into a three-dimensional supramolecular structure.


Author(s):  
Maruthupandiyan Priyatharsini ◽  
Bhaskaran Shankar ◽  
Malaichamy Sathiyendiran ◽  
Navaneethakrishnan Srinivasan ◽  
Rajaputi Venkatraman Krishnakumar

The title dinuclear complex, [Re2(C13H8NOS)2(CO)6], crystallizes in two polymorphs where the 2-(1,3-benzothiazol-2-yl)phenolate ligands and two carbonyl groups aretrans- (I) orcis-arranged (II) with respect to the [Re2O2(CO)4] core. PolymorphsIandIIexhibit a crystallographically imposed centre of symmetry and a twofold rotation axis, respectively. The structures may be described as being formed by two octahedrally distorted metal-coordinating units fused through μ-oxido bridges, leading to edge-sharing dimers. The crystal packing is governed by C—H...O hydrogen-bonding interactions, forming chains parallel to thecaxis inIand a three-dimensional network inII.


Author(s):  
Selma Dhifaoui ◽  
Wafa Harhouri ◽  
Anna Bujacz ◽  
Habib Nasri

In the title compound, [FeII(C44H24Cl4N4)(C6H5CH2NH2)2]·C6H14or [FeII(TPP-Cl)(BzNH2)2]·n-hexane [where TPP-Cl and BzNH2are 5,10,15,20-tetrakis(4-chlorophenyl)porphyrinate and benzylamine ligands, respectively], the FeIIcation lies on an inversion centre and is octahedrally coordinated by the four pyrrole N atoms of the porphyrin ligand in the equatorial plane and by two amine N atoms of the benzylamine ligand in the axial sites. The crystal structure also contains one inversion-symmetricn-hexane solvent molecule per complex molecule. The average Fe—Npyrrolebond length [1.994 (3) Å] indicates a low-spin complex. The crystal packing is sustained by N—H...Cl and C—H...Cl hydrogen-bonding interactions and by C—H...π intermolecular interactions, leading to a three-dimensional network structure.


Author(s):  
Tristan Neumann ◽  
Inke Jess ◽  
Christian Näther

The asymmetric unit of the title complex, [Zn(SCN)2(C6H6N2O)2], consists of one Zn2+cation located on a twofold rotation axis, as well as of one thiocyanate anion and one neutral isonicotinamide ligand, both occupying general positions. The Zn2+cation is tetrahedrally coordinated into a discrete complex by the N atoms of two symmetry-related thiocyanate anions and by the pyridine N atoms of two isonicotinamide ligands. The complexes are linked by intermolecular C—H...O and N—H...O, and weak intermolecular N—H...S hydrogen-bonding interactions into a three-dimensional network.


1999 ◽  
Vol 55 (3) ◽  
pp. 389-395 ◽  
Author(s):  
Ping Zhou ◽  
Feng Xue ◽  
Steve C. F. Au-Yeung ◽  
Xiao-ping Xu

The crystal structures of [18]aneN6H2K[Co(CN)6].4H2O [potassium dihydrogen hexacyanocobaltate–1,4,7,10,13,16-hexaazacyclooctadecane–water (1/1/4)], [16]aneN4H2K[Co(CN)6] [potassium dihydrogen hexacyanocobaltate–1,5,9,13-tetraazacyclohexadecane (1/1)] and [12]aneN4H3[Co(CN)6].2H2O [trihydrogen hexacyanocobaltate–1,4,7,10-tetraazacyclododecane–water (1/1/2)] have been determined. For these supercomplexes, the [Co(CN)6]3− binding with protonated polyammonium macrocycles is dominant in the binding competition between K+ and [Co(CN)6]3−. It is suggested that the binding of [Co(CN)6]3− with protonated polyammonium macrocycles is independent of the cavity size of the macrocycle, whereas that of K+ is size-match selective. For [18]aneN6H2K[Co(CN)6].4H2O, the formation of a two-dimensional lamella may be derived from a chain-like arrangement of four-, five- and eight-membered rings in the network through the mutual balance between electrostatic and hydrogen-bonding interactions. [16]aneN4H2K[Co(CN)6] is a novel example demonstrating the anchoring of cobalticyanide through hydrogen-bonding interactions inside a zeolite-type cavity in the three-dimensional network formed by K+ and the macrocycles through Coulombic interactions. Also, a three-dimensional network was formed mainly through hydrogen-bonding interactions between [Co(CN)6]3−, protonated macrocycles and water molecules in [12]aneN4H3[Co(CN)6].2H2O.


IUCrData ◽  
2018 ◽  
Vol 3 (1) ◽  
Author(s):  
Min Ren ◽  
Ming Yue ◽  
Jingwen Ran

In the centrosymmetric cation of the title compound, [Ag(C6H12N4O3)2]NO3, the AgI ion, lying on a threefold rotoinversion axis, is coordinated by two N atoms and six O atoms from two nitrilotriacetamide ligands, forming a distorted dodecahedral environment. In the crystal, cations and anions are linked through N—H...O hydrogen-bonding interactions, leading to a three-dimensional network structure.


2015 ◽  
Vol 71 (12) ◽  
pp. m275-m276 ◽  
Author(s):  
Waqas Sethi ◽  
Heini V. Johannesen ◽  
Thorbjørn J. Morsing ◽  
Stergios Piligkos ◽  
Høgni Weihe

The title compound, [Co2(L)2]3+·3NO3−[whereL= CH3C(CH2NHCH2CH2OH1/2)3], has been synthesized from the ligand 1,1,1-tris(2-hydroxyethylaminomethyl)ethane. The cobalt(III) dimer has an interesting and uncommon O—H...O hydrogen-bonding motif with the three bridging hydroxy H atoms each being equally disordered over two positions. In the dimeric trication, the octahedrally coordinated CoIIIatoms and the capping C atoms lie on a threefold rotation axis. The N atoms of two crystallographically independent nitrate anions also lie on threefold rotation axes. N—H...O hydrogen bonding between the complex cations and nitrate anions leads to the formation of a three-dimensional network structure. The compound is a racemic conglomerate of crystals containing either D or L molecules. The crystal used for this study is a D crystal.


2006 ◽  
Vol 62 (4) ◽  
pp. m796-m798 ◽  
Author(s):  
Zerrin Heren ◽  
Cem Cüneyt Ersanlı ◽  
Cem Keser ◽  
Nazan Ocak Ískeleli

The crystal structure of the title compound, [Co(C6H4NO2)2(H2O)2]·2H2O, has been reinvestigated with improved precision [previous reports: Chang et al. (1972). J. Coord. Chem. 2, 31–34; Lumme et al. (1969). Suom. Kemistil. B, 42, 270]. In the title compound, the Co atom is located on an inversion center and its coordination can be described as slightly distorted octahedral, equatorially trans-coordinated by two N and O atoms of two picolinate ligands and axially coordinated by two O atoms of the water molecules. Intermolecular O—H...O and C—H...O hydrogen-bonding interactions result in the formation of an intricate three-dimensional network.


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