scholarly journals Bis[μ-2-(trimethylsilylamido)-6-(trimethylsilylamino)pyridine-κ3N1,N2:N2]bis[(diethyl ether-κO)lithium(I)]

IUCrData ◽  
2016 ◽  
Vol 1 (5) ◽  
Author(s):  
Justin A. Rave ◽  
Diego A. Garcia ◽  
Patrick C. Hillesheim ◽  
Gary L. Guillet
Keyword(s):  
Diethyl Ether ◽  
Electrostatic Interactions ◽  
Title Complex ◽  
Lithium Cation ◽  
Tetrahedral Coordination ◽  
Dimeric Complex ◽  
Pyridine Ligand ◽  
Coordination Environment ◽  
Dominant Feature ◽  
Ether Molecule

The title complex, [Li2(C11H22N3Si2)2(C4H10O)2], crystallizes in theP-1 space group with one molecule of a centrosymmetric dimeric complex in the unit cell. The lithium cation is coordinated in a bidentate fashion by the pyridyl N atom and a silylamido N atom of one 2,6-bis(trimethylsilylamido)pyridine ligand and by a monodentate, bridging silylamido N atom of another. A diethyl ether molecule completes the tetrahedral coordination environment for each lithium atom. Neither intra- nor intermolecular hydrogen bonding nor π–π stacking are observed in the crystal, likely indicating that weak electrostatic interactions are the dominant feature leading to the supramolecular structure.

scholarly journals Crystal structure of (acetonitrile-κN)iodido(2-(naphthalen-1-yl)-6-{1-[(2,4,6-trimethylphenyl)imino]ethyl}pyridine-κ2N,N′)copper(I)

2016 ◽  
Vol 72 (12) ◽  
pp. 1845-1847
Author(s):  
Nada Al-Najjar ◽  
Gregory A. Solan ◽  
Kuldip Singh
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Title Complex ◽  
Tetrahedral Coordination ◽  
Pyridine Ligand ◽  
Complex Molecules ◽  
Coordination Environment ◽  
Dimensional Network ◽  
Distorted Tetrahedral Coordination

In the mononuclear title complex, [CuI(C2H3N)(C26H24N2)], the CuIion has a distorted tetrahedral coordination environment, defined by two N atoms of the chelating 2-(naphthalen-1-yl)-6-[(2,4,6-trimethylphenyl)imino]pyridine ligand, one N atom of an acetonitrile ligand and one iodide ligand. Within the complex, there are weak intramolecular C—H...N hydrogen bonds, while weak intermolecular C—H...I interactions between complex molecules, help to facilitate a three-dimensional network.

scholarly journals Bis[2,6-bis(trimethylsilylamino)pyridine-κN1]{[6-bis(trimethylsilylamino)pyridin-2-yl-κN1](trimethylsilyl)azanido-κN}lithium

IUCrData ◽  
2016 ◽  
Vol 1 (3) ◽  
Author(s):  
Justin A. Rave ◽  
Diego A. Garcia ◽  
Patrick C. Hillesheim ◽  
Gary L. Guillet
Keyword(s):  
Electrostatic Interactions ◽  
Crystal Packing ◽  
Chelate Ring ◽  
Title Complex ◽  
The Other ◽  
Lithium Cation ◽  
Intermolecular Hydrogen Bonding ◽  
Tetrahedral Environment ◽  
Pyridine Nitrogen ◽  
Dominant Feature

The title complex, [Li(C11H22N3Si2)(C11H23N3Si2)2], contains a single lithium cation coordinated to three ligands. This is the first reported example of the ligand 2,6-bis(trimethylsilylamino)pyridine supporting a monometallic complex. One ligand is mono-anionic and forms a four-membered chelate ring with the lithium cationviathe pyridine and silylamido N atoms. The other two ligands are neutral and bindviathe pyridine nitrogen. The lithium cation is coordinated in a tetrahedral environment. No intra- or intermolecular hydrogen bonding is observed in the crystal structure, likely indicating that weak electrostatic interactions are the dominant feature of the crystal packing.

scholarly journals Bis[μ-N,N′-(pyridine-2,6-diyl)bis(trimethylsilylamido)-1κ2N1,N2;2:3κ2N6:N6]bis(tetrahydrofuran)-2:3κ2O-1-nickel(II)-2,3-lithium(I)

IUCrData ◽  
2018 ◽  
Vol 3 (1) ◽  
Author(s):  
Alan M. Boltin ◽  
Gary L. Guillet
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Electrostatic Interactions ◽  
Rotational Symmetry ◽  
Title Complex ◽  
Planar Geometry ◽  
Intermolecular Hydrogen Bonding ◽  
Trimethylsilyl Group ◽  
Square Planar ◽  
Dominant Feature

The title complex, [Li2Ni(C11H21N3Si2)2(C4H8O)2], is a trimetallic complex of two LiIcations and a NiIIcation bridged by twoN,N′-(pyridine-2,6-diyl)bis(trimethylsilylamide) ligands that crystallizes in theFdd2 space group. The molecule hasC2rotational symmetry, with the NiIIcation located on the twofold axis. The coordination sphere of the NiIIcation is composed of two amido N and two pyridyl N-atom donors in a distorted square-planar geometry. The LiIcations are coordinated by two amido N-atom donors and a tetrahydrofuran molecule with a long interaction with a pyridyl N-atom donor. The coordinating tetrahydrofuran ligand and a trimethylsilyl group are disordered. Intra- or intermolecular hydrogen bonding, as well as π–π stacking, are not observed between the molecules, likely indicating that weak electrostatic interactions are the dominant feature leading to the crystal structure.

scholarly journals Dichlorido(pyridine-κN)[2-(pyridinium-1-yl)acetato-κO]zinc(II)

2012 ◽  
Vol 68 (4) ◽  
pp. m485-m485
Author(s):  
Zhang Qun ◽  
Chen Jin-Xiang
Keyword(s):  
Title Complex ◽  
Carboxylate Ligand ◽  
Coordination Geometry ◽  
Tetrahedral Coordination ◽  
Pyridine Ligand ◽  
Cl Atoms ◽  
Distorted Tetrahedral Coordination

In the title complex, [ZnCl2(C5H5N)(C7H7NO2)], the ZnIIatom adopts a distorted tetrahedral coordination geometry [the smallest angle being 105.22 (15)° and the widest angle being 115.60 (16)°] that is formed from one monodentate carboxylate ligand, one pyridine ligand and two Cl atoms.

Dichloro[2,2′-(methylenedithio)bi-1,3-thiazole-κ2 N,N′]cobalt(II)

2006 ◽  
Vol 62 (7) ◽  
pp. m1579-m1581
Author(s):  
Wen-Tao Zhao ◽  
Hui-Min Liu ◽  
Wen-Qin Zhang
Keyword(s):  
Dihedral Angle ◽  
Bidentate Ligand ◽  
Title Complex ◽  
Tetrahedral Coordination ◽  
Coordination Environment ◽  
Twofold Axis ◽  
Coordination Sites ◽  
Distorted Tetrahedral Coordination

In the title complex, [CoCl2(C7H6N2S4)], 2,2′-(methylenedithio)bi-1,3-thiazole acts as a bidentate ligand and chelates one CoII ion through the two N atoms to give an eight-membered symmetric unit. The CoII ion is located on a twofold axis and displays a slightly distorted tetrahedral coordination environment, where the two Cl− anions occupy the remaining coordination sites. The N—Co—N and Cl—Co—Cl planes are nearly perpendicular, with a dihedral angle of 88.0 (3)°.

scholarly journals (18-Crown-6-κ6O){(trimethylsilyl)[6-(trimethylsilylamino)pyridin-2-yl-κN1]azanido-κN}potassium(I)

IUCrData ◽  
2016 ◽  
Vol 1 (8) ◽  
Author(s):  
Sydney E. Toney ◽  
Patrick C. Hillesheim ◽  
Gary L. Guillet
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Electrostatic Interactions ◽  
Crystal Packing ◽  
Ion Pair ◽  
Membered Ring ◽  
Title Complex ◽  
Intermolecular Hydrogen Bonding ◽  
Contact Ion Pair ◽  
Dominant Feature

The title complex, [K(C11H22N3Si2)(C12H24O6)], contains a single K+cation coordinated by a monoanionic (6-trimethylsilylaminopyridin-2-yl)(trimethylsilyl)azanide (HL) ligand and an 18-crown-6 ligand. One SiMe3group in HLis disordered over two positions, with an occupancy ratio of 0.727 (7):0.273 (7). The K+cation is eight-coordinated, distributed between the pyridyl and azanide N atoms of HL, forming a four-membered ring, and a κ618-crown-6 ligand. The complex is best described as a contact ion pair and, unlike other similar literature examples, this complex does not dimerize. No intermolecular hydrogen bonding is observed in the crystal structure, likely indicating that weak electrostatic interactions are the dominant feature directing the crystal packing.

scholarly journals Dichlorido(pyridine-κN)[2,3,5,6-tetrakis(pyridin-2-yl)pyrazine-κ3 N 2,N 1,N 6]nickel(II)

IUCrData ◽  
2021 ◽  
Vol 6 (2) ◽  
Author(s):  
Kwang Ha
Keyword(s):  
Rotation Axis ◽  
Title Complex ◽  
Octahedral Coordination ◽  
Pyridine Ligand ◽  
Complex Molecules ◽  
Coordination Environment ◽  
Distorted Octahedral Coordination ◽  
Distorted Octahedral ◽  
Distorted Octahedral Coordination Environment

In the title complex, [NiCl2(C5H5N)(C24H16N6)], the NiII ion is six-coordinated in a distorted octahedral coordination environment defined by three N atoms of the tridentate 2,3,5,6-tetra-2-pyridylpyrazine ligand, one N atom of the pyridine ligand and two Cl− anions, with the latter being mutually trans. The complex is disposed about a twofold rotation axis along the a axis. The complex molecules are connected in the crystal via C—H...Cl, C—H...N and π–π [closest inter-centroid separation = 3.7446 (14) Å between pyridyl rings].

scholarly journals Synthesis and crystal structure of [Pd{C6H4(CH2NHCH2Ph)-2-κ2C,N}(μ-I)]2

2017 ◽  
Vol 73 (11) ◽  
pp. 1612-1615
Author(s):  
Delia Bautista ◽  
Sergio J. Benitez-Benitez
Keyword(s):  
Crystal Structure ◽  
Significant Influence ◽  
Title Complex ◽  
Asymmetric Unit ◽  
Coordination Environment ◽  
Synthesis And Crystal Structure ◽  
Square Planar ◽  
Intermolecular Contacts ◽  
Type C ◽  
Methyl Phenyl

The binuclear title complex, di-μ-iodido-bis({2-[(benzylamino-κN)methyl]phenyl-κC1}palladium(II)), [Pd2I2(C14H14N)2], was prepared by reaction of [Pd{C6H4(CH2NHCH2Ph)-2}(μ-OAc)]2with NaI. It crystallizes with one discrete molecule in the asymmetric unit. The molecule presents an iodide-bridged dimeric structure with acisoidarrangement with respect to theC,N-cyclopalladated ligands. Both PdIIatoms have a slightly distorted square-planar coordination environment. Weak intermolecular contacts of the type C—H...Pd seem to have a significant influence on the arrangement of the molecules along thebaxis in the crystal.

scholarly journals Crystal structure and electrochemical properties of [Ni(bztmpen)(CH3CN)](BF4)2{bztmpen isN-benzyl-N,N′,N′-tris[(6-methylpyridin-2-yl)methyl]ethane-1,2-diamine}

2017 ◽  
Vol 73 (6) ◽  
pp. 825-828
Author(s):  
Lin Chen ◽  
Gan Ren ◽  
Yakun Guo ◽  
Ge Sang
Keyword(s):  
Crystal Structure ◽  
Electrochemical Properties ◽  
Catalytic Reaction ◽  
Room Temperature ◽  
Title Complex ◽  
Methyl Substituent ◽  
Coordination Environment ◽  
Acetonitrile Molecule ◽  
Redox Couples ◽  
Open Site

The mononuclear nickel title complex (acetonitrile-κN){N-benzyl-N,N′,N′-tris[(6-methylpyridin-2-yl)methyl]ethane-1,2-diamine}nickel(II) bis(tetrafluoridoborate), [Ni(C30H35N5)(CH3CN)](BF4)2, was prepared from the reaction of Ni(BF4)2·6H2O withN-benzyl-N,N′,N′-tris[(6-methylpyridin-2-yl)methyl]ethane-1,2-diamine (bztmpen) in acetonitrile at room temperature. With an open site occupied by the acetonitrile molecule, the nickel(II) atom is chelated by five N-atom sites from the ligand and one N atom from the ligand, showing an overall octahedral coordination environment. Compared with analogues where the 6–methyl substituent is absent, the bond length around the Ni2+cation are evidently longer. Upon reductive dissociation of the acetronitrile molecule, the title complex has an open site for a catalytic reaction. The title complex has two redox couples at −1.50 and −1.80 V (versus Fc+/0) based on nickel. The F atoms of the two BF4−counter-anions are split into two groups and the occupancy ratios refined to 0.611 (18):0.389 (18) and 0.71 (2):0.29 (2).

scholarly journals Crystal structure of tetraaquabis(1,3-dimethyl-2,6-dioxo-7H-purin-7-ido-κN7)cobalt(II)

2017 ◽  
Vol 73 (9) ◽  
pp. 1302-1304 ◽  
Author(s):  
Hicham El Hamdani ◽  
Mohammed El Amane ◽  
Carine Duhayon
Keyword(s):  
Crystal Structure ◽  
Three Dimensional ◽  
Title Complex ◽  
Water Molecules ◽  
Supramolecular Network ◽  
Coordination Environment ◽  
Distorted Octahedral Coordination ◽  
Distorted Octahedral ◽  
Intramolecular Hydrogen ◽  
Distorted Octahedral Coordination Environment

The title complex, [Co(C7H7N4O2)2(H2O)4], comprises mononuclear molecules consisting of a CoIIion, two deprotonated theophylline ligands (systematic name: 1,3-dimethyl-7H-purine-2,6-dione) and four coordinating water molecules. The CoIIatom lies on an inversion centre and has a slightly distorted octahedral coordination environment, with two N atoms of twotrans-oriented theophylline ligands and the O atoms of four water molecules. An intramolecular hydrogen bond stabilizes this conformation. A three-dimensional supramolecular network structure is formed by intermolecular O—H...O and O—H...N hydrogen bonds.

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