Synthesis and crystal structure of an octahedral nickel(II) complex derived from pentaerythrityl tetraamine

1989 ◽  
Vol 67 (10) ◽  
pp. 1650-1656 ◽  
Author(s):  
A. McAuley ◽  
S. Subramanian ◽  
T. W. Whitcombe
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Three Dimensional ◽  
Amino Group ◽  
Amino Groups ◽  
Octahedral Structure ◽  
Synthesis And Crystal Structure ◽  
Bond Lengths ◽  
Esr Spectrum ◽  
Counter Ion

The Ni(II) complex, Ni(Htam)24+ (tam = pentaerythrityl tetraamine), has been prepared under controlled conditions. In this ion, three of the four amino groups of each ligand are coordinated to yield an octahedral structure which shows tetragonal and trigonal distortion. The fourth amino group is protonated in each case and binds strongly to the counter ion SO42−. The crystal structure (triclinic, [Formula: see text], a = 8.913(3), b = 9.775(2), c = 7.505(3), α = 102.61(4)°, β = 106.28(4)°, γ = 96.40(3)°) has been refined, converging to final values of R = 0.0347 and Rw = 0.0386. The three dimensional nature of the hydrogen bonding in the crystal structure has been described. Differences in Ni—N bond lengths are observed. A transient nickel(III) species is generated chemically or electrochemically. The esr spectrum is consistent with a low spin d7 centre and is axial in nature. Keywords: nickel, pentaerythrityl tetraamine, hydrogen bonding, oxidation.

A novel self-complementary three-dimensional inorganic network organized by H-bond dimers of inorganic chains — Synthesis and crystal structure of (C6H16N2)[Zn(HPO4)2]

2004 ◽  
Vol 82 (5) ◽  
pp. 616-621 ◽  
Author(s):  
Xian-Ming Zhang ◽  
Chan-Juan Bai ◽  
Yan-Li Zhang ◽  
Hai-Shun Wu
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Three Dimensional ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
Crystal Structural ◽  
Inorganic Framework ◽  
Phosphate Groups ◽  
Inorganic Network

A novel organic-templated zincophosphate, namely (C6H16N2)[Zn(HPO4)2], was hydrothermally synthesized and X-ray single-crystal structural analysis reveals that the anions [Zn(HPO4)2]2–, which have square-twisted chains containing corner-sharing four-rings of alternating ZnO4 and PO4 tetrahedra, are assemblied via self-complementary strong and symmetrical hydrogen-bonding R22(8) synthons between the phosphate groups into three-dimensional hydrogen bond frameworks featuring three-dimensional intersecting pseudochannels. The doubly protonated 2,5-dimethylpiperazinium cations are attached to the three-dimensional inorganic framework via N-H···O hydrogen bonds to strengthen the 3-D network.

Erdalkaliquadratate, I BaC4O4 · 3H2O / Alkaline-earth Squarates, I BaC4O4 · 3H2O

1986 ◽  
Vol 41 (12) ◽  
pp. 1485-1489 ◽  
Author(s):  
Christian Robl ◽  
Armin Weiss
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Silica Gel ◽  
Alkaline Earth ◽  
Three Dimensional ◽  
Water Molecules ◽  
Bond Lengths ◽  
Resonance Stabilization ◽  
Aqueous Silica

Abstract BaC4O4-3H2O was prepared by crystallization in aqueous silica gel. The crystal structure is a complicated three-dimensional framework. Ba2+ has CN 8+1. It is surrounded by 5 water molecules and 4 Osquarate atoms (Ba-O distances from 271.1 to 324.2 pm). The squarate dianion is almost planar and shows C -C and C-O bond lengths indicating the existence of resonance stabilization, although one Osquarate atom is not connected to Ba2+ at all. Short water-Osquarate distances hint to strong hydrogen bonding which obviously plays an important part in this structure.

scholarly journals Synthesis and crystal structure of catena-poly[[tetra-μ-acetato-copper(II)]-μ-6-ethoxy-N 2,N 4-bis[2-(pyridin-2-yl)ethyl]-1,3,5-triazine-2,4-diamine]

2021 ◽  
Vol 77 (3) ◽  
pp. 319-323
Author(s):  
Mayokun J. Ayodele ◽  
Travis C. Green ◽  
W. A. Chathuri V. Warsapperuma ◽  
Malcolm D. E. Forbes ◽  
Alexis D. Ostrowski
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Dispersion Forces ◽  
Metal Core ◽  
Pyridyl Nitrogen ◽  
Synthesis And Crystal Structure ◽  
Space Group ◽  
Paddle Wheel

The title compound, [Cu2(C19H23N7O)(C2H3O2)4] n , was obtained via reaction of copper(II) acetate with the coordinating ligand, 6-ethoxy-N 2,N 4-bis[2-(pyridin-2-yl)ethyl]-1,3,5-triazine-2,4-diamine. The crystallized product adopts the monoclinic P21/c space group. The metal core exhibits a paddle-wheel structure typical for dicopper tetraacetate units, with triazine and pyridyl nitrogen atoms from different ligands coordinating to the two axial positions of the paddle wheel in an asymmetric manner. This forms a coordination polymer with the segments of the polymer created by the c-glide of the P21/c setting of the space group. The resulting chains running along the c-axis direction are held together by intramolecular N—H...O hydrogen bonding. These chains are further packed by dispersion forces, producing an extended three-dimensional structure.

scholarly journals Synthesis and crystal structure of poly[(3-amino-1,2,4-triazole)(μ3-1H-benzimidazole-5,6-dicarboxylato)cobalt(II)]

2021 ◽  
Vol 77 (7) ◽  
pp. 714-717
Author(s):  
Chen Zhao ◽  
Yi Li ◽  
Jin-Sheng Xiao ◽  
Peng-Dan Zhang ◽  
Xue-Qian Wu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Three Dimensional ◽  
Chain Structure ◽  
Asymmetric Unit ◽  
Straight Chain ◽  
Tetrahedral Geometry ◽  
Synthesis And Crystal Structure ◽  
One Dimensional ◽  
Hydrogen Bonding Interactions

The asymmetric unit of the title coordination polymer, [Co(C9H4N2O4)(C2H4N4)] n or [Co(L 1)(L 2)] n , consists of one crystallographically independent Co2+ centre, one L 1 2− ligand and one L 2 ligand (L 1 = 1H-benzimidazole-5,6-dicarboxylic acid, L 2 = 3-amino-1,2,4-triazole). The Co2+ centre is coordinated by two carboxylato-O atoms from two independent L 1 2− ligands and two nitrogen atoms from L 2 and another L 1 ligand. Thus, the metal center adopts a four-coordinate mode, forming a tetrahedral geometry. Interestingly, through the combination of two L 1 2−, two L 2 ligands and two Co2+ ions, a basic repeating unit is constructed, resulting in the formation of a one-dimensional straight chain structure. These chains are further expanded to the final three-dimensional framework via N—H...O hydrogen-bonding interactions.

scholarly journals Three salts from the reactions of cysteamine and cystamine withL-(+)-tartaric acid

2013 ◽  
Vol 69 (6) ◽  
pp. 658-664 ◽  
Author(s):  
Amina Benylles ◽  
Donald Cairns ◽  
Philip J. Cox ◽  
Graeme Kay
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Tartaric Acid ◽  
Three Dimensional ◽  
Water Molecules ◽  
Amino Groups ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
Hydrogen Bonding Networks

Reaction between cysteamine (systematic name: 2-aminoethanethiol, C2H7NS) and L-(+)-tartaric acid [systematic name: (2R,3R)-2,3-dihydroxybutanedioic acid, C4H6O6] results in a mixture of cysteamine tartrate(1−) monohydrate, C2H8NS+·C4H5O6−·H2O, (I), and cystamine bis[tartrate(1−)] dihydrate, C4H14N2S22+·2C4H5O6−·2H2O, (III). Cystamine [systematic name: 2,2′-dithiobis(ethylamine), C4H12N2S2], reacts with L-(+)-tartaric acid to produce a mixture of cystamine tartrate(2−), C4H14N2S22+·C4H4O62−, (II), and (III). In each crystal structure, the anions are linked by O—H...O hydrogen bonds that run parallel to theaaxis. In addition, hydrogen bonding involving protonated amino groups in all three salts, and water molecules in (I) and (III), leads to extensive three-dimensional hydrogen-bonding networks. All three salts crystallize in the orthorhombic space groupP212121.

scholarly journals Crystal structure of bis(1,3-diaminopropane-κ2N,N′)bis[2-(4-nitrophenyl)acetato-κO]cadmium

2016 ◽  
Vol 72 (2) ◽  
pp. 226-228
Author(s):  
Ian M. Rahn ◽  
Carlos L. Crawford ◽  
Zerihun Assefa ◽  
Jeffery Hendrich ◽  
Richard E. Sykora
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Network Structure ◽  
Layered Structure ◽  
Three Dimensional ◽  
Amino Groups ◽  
Coordination Environment ◽  
Hydrogen Bonding Interactions ◽  
Dimensional Network

In the structure of the title compound, [Cd(C8H6NO4)2(C3H10N2)2], the CdIIatom is located on a center of symmetry with one independent Cd—O distance of 2.3547 (17) Å and two Cd—N distances of 2.3265 (18) and 2.3449 (19) Å. The CdIIatom has an overall octahedral coordination environment. Several types of hydrogen-bonding interactions are evident. Both intra- and intermolecular interactions occur between the amino groups and the O atoms of the acetate group. These N—H...O hydrogen bonds lead to a layered structure extending parallel to thebcplane. In addition, weak intermolecular C—H...O interactions involving the nitro groups exist, leading to the formation of a three-dimensional network structure.

Synthesis and Crystal Structure of μ-Oxo-bis(phosphenyl-ortho-toluidide)

1978 ◽  
Vol 33 (7) ◽  
pp. 728-730 ◽  
Author(s):  
T. Stanley Cameron ◽  
Ruth E. Cordes ◽  
Florence A. Jackman
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Title Compound ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
Bond Lengths

The title compound was synthesised in an attempt to prepare phosphenyl-tri-ortho-toluidine, X-ray crystallographic studies show that it contains a P-O-P bridge with extensively hydrogen bonding between groups. The P-N bond lengths are different and this can be attributed to some combination of hydrogen bonding and varying p II-d ZII interactions along the bond.

Aminosulfonic acids. Part 1. Crystal structures of N-methylaminomethanesulfonic acid, MeNHCH2SO3H, and disodium N-methyliminobis(methanesulfonate) dihydrate, MeN(CH2SO3Na)2•2H2O

1984 ◽  
Vol 62 (3) ◽  
pp. 540-548 ◽  
Author(s):  
T. Stanley Cameron ◽  
Walter J. Chute ◽  
Osvald Knop
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Crystal Structures ◽  
Water Molecules ◽  
Amino Group ◽  
Orientational Disorder ◽  
Space Group ◽  
Bond Lengths ◽  
Hydrogen Bonded

The crystal structure of N-methylaminomethanesulfonic acid (P212121, a = 5.455(1) Å, b = 7.791(1) Å, c = 11.925(2) Å, Z = 4) consists of +MeNH2CH2SO3− zwitterions hydrogen-bonded to form infinite chains about screw axes parallel to a. In the structure of MeN(CH2SO3Na)2•2H2O (Pbcn, a = 10.469(1) Å, b = 6.039(3) Å, c = 17.549(3) Å, Z = 4), layers of MeN(CH2SO3−)2 anions alternate with layers of Na+ ions parallel to (001). The anions are linked by [Formula: see text] bonds between the water molecules and the O(2) atoms of the sulfonate groups. Because of the twofold orientational disorder of the N—CH3 groups the space group Pbcn is only statistical.The S—C, C—N, and S—O bond lengths in solid aminosulfonic acids and their salts are discussed with a view to detecting the existence of effects due to deprotonation of the amino group and to hydrogen bonding.

7-Cyclopropyl-2′-deoxytubercidin: a carbocyclic side-chain derivative of 7-deaza-2′-deoxyadenosine

2014 ◽  
Vol 70 (12) ◽  
pp. 1116-1120 ◽  
Author(s):  
Haozhe Yang ◽  
Simone Budow-Busse ◽  
Henning Eickmeier ◽  
Hans Reuter ◽  
Frank Seela
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Torsion Angle ◽  
Three Dimensional ◽  
Side Chain ◽  
Sugar Residue ◽  
Amino Groups ◽  
Bifurcated Hydrogen Bond ◽  
The Individual

The title compound {systematic name: 4-amino-5-cyclopropyl-7-(2-deoxy-β-D-erythro-pentofuranosyl)-7H-pyrrolo[2,3-d]pyrimidine}, C14H18N4O3, exhibits anantiglycosylic bond conformation, with the torsion angle χ = −108.7 (2)°. The furanose group shows a twisted C1′-exosugar pucker (S-type), withP= 120.0 (2)° and τm= 40.4 (1)°. The orientation of the exocyclic C4′—C5′ bond is -ap(trans), with the torsion angle γ = −167.1 (2)°. The cyclopropyl substituent points away from the nucleobase (antiorientation). Within the three-dimensional extended crystal structure, the individual molecules are stacked and arranged into layers, which are highly ordered and stabilized by hydrogen bonding. The O atom of the exocyclic 5′-hydroxy group of the sugar residue acts as an acceptor, forming a bifurcated hydrogen bond to the amino groups of two different neighbouring molecules. By this means, four neighbouring molecules form a rhomboidal arrangement of two bifurcated hydrogen bonds involving two amino groups and two O5′ atoms of the sugar residues.

scholarly journals Synthesis and crystal structure of (1,8-naphthyridine-κ2 N,N′)[2-(1H-pyrazol-1-yl)phenyl-κ2 N 2,C 1]iridium(III) hexafluoridophosphate dichloromethane monosolvate

2020 ◽  
Vol 76 (1) ◽  
pp. 82-85
Author(s):  
Yunfeng Ye ◽  
Guodong Tang ◽  
Jun Qian
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Network Structure ◽  
Solvent Molecule ◽  
Three Dimensional ◽  
Asymmetric Unit ◽  
Synthesis And Crystal Structure ◽  
Counter Ion ◽  
Dimensional Network ◽  
Counter Ions

The solvated title salt, [Ir(C9H7N2)2(C8H6N2)]PF6·CH2Cl2, was obtained from the reaction between 1,8-naphthyridine (NAP) and an orthometalated iridium(III) precursor containing a 1-phenylpyrazole (ppz) ligand. The asymmetric unit comprises one [Ir(ppz)2(NAP)]+ cation, one PF6 − counter-ion and one CH2Cl2 solvent molecule. The central IrIII atom of the [Ir(ppz)2(NAP)]+ cation is distorted-octahedrally coordinated by four N atoms and two C atoms, whereby two N atoms stem from the NAP ligand while the ppz ligands ligate through one N and one C atom each. In the crystal, the [Ir(ppz)2(NAP)]+ cations and PF6 − counter-ions are connected with each other through weak intermolecular C—H...F hydrogen bonds. Together with an additional C—H...F interaction involving the solvent molecule, a three-dimensional network structure is formed.

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