scholarly journals Bis(azido-κN)(di-2-pyridylamine-κ2N2,N2′)palladium(II)

2012 ◽  
Vol 68 (4) ◽  
pp. m519-m519
Author(s):  
Kwang Ha
Keyword(s):  
Hydrogen Bonds ◽  
Least Squares ◽  
Dihedral Angle ◽  
Title Complex ◽  
Dihedral Angles ◽  
Boat Conformation ◽  
Coordination Environment ◽  
Square Planar

In the title complex, [Pd(N3)2(C10H9N3)], the PdIIion is in a slightly distorted square-planar coordination environment. The ligator atoms comprise the two pyridine N atoms of the chelating di-2-pyridylamine (dpa) ligand and two N atoms from two azide anions. The dpa ligand coordinates the Pd atom in a boat conformation, the dihedral angle between the pyridine rings being 24.4 (1)°. The pyridine rings are somewhat inclined to the least-squares plane of the PdN4unit, making dihedral angles of 29.02 (9) and 26.47 (9)°. The azide ligands are slightly bent, with N—N—N angles of 173.0 (4) and 174.2 (4)°. In the crystal, molecules are connected by N—H...N and C—H...N hydrogen bonds, forming chains along thecaxis. When viewed down thebaxis, successive chains are stacked in opposite directions. Intramolecular C—H...N hydrogen bonds are also observed.

scholarly journals (2,3-Di-2-pyridylpyrazine-κ2 N 2,N 3)diiodidoplatinum(II)

2012 ◽  
Vol 68 (6) ◽  
pp. m834-m834 ◽  
Author(s):  
Kwang Ha
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Least Squares ◽  
Dihedral Angle ◽  
Layer Structure ◽  
Title Complex ◽  
Maximum Deviation ◽  
Hydrogen Bond Acceptor ◽  
Pyrazine Ring ◽  
Square Planar

The PtII ion in the title complex, [PtI2(C14H10N4)], exists in a distorted square-planar environment defined by the two pyridine N atoms of the chelating 2,3-di-2-pyridylpyrazine ligand and two iodide anions. The pyridine rings are inclined to the least-squares plane of the PtI2N2 unit [maximum deviation = 0.070 (3) Å] at 66.1 (2) and 65.9 (2)°; the pyrazine ring is perpendicular to this plane [dihedral angle = 89.7 (2)°]. Two intermolecular C—H...I hydrogen bonds, both involving the same I atom as hydrogen-bond acceptor, generate a layer structure extending parallel to (001). Molecules are stacked in columns along the a axis. Along the b axis, successive molecules stack in opposite directions.

scholarly journals Crystal structure of bis{2-[(E)-(4-fluorobenzyl)iminomethyl]phenolato-κ2N,O}nickel(II)

2014 ◽  
Vol 70 (10) ◽  
pp. 252-255 ◽  
Author(s):  
Amalina Mohd Tajuddin ◽  
Hadariah Bahron ◽  
Rohazila Mohammad Hanafiah ◽  
Nazlina Ibrahim ◽  
Hoong-Kun Fun ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Complex ◽  
Asymmetric Unit ◽  
Schiff Base Ligands ◽  
Coordination Environment ◽  
Square Planar ◽  
Coordination Plane

The asymmetric unit of the title complex, [Ni(C14H11FNO)2], contains one-half of the molecule with the NiIIcation lying on an inversion centre coordinated by a bidentate Schiff base anion. The cationic NiIIcenter is in a distorted square-planar coordination environment chelated by the imine N and phenolate O donor atoms of the two Schiff base ligands. The N and O donor atoms of the two ligands are mutuallytranswith Ni—N and Ni—O bond lengths of 1.9242 (10) and 1.8336 (9) Å, respectively. The fluorophenyl ring is almost orthogonal to the coordination plane and makes a dihedral angle of 82.98 (7)° with the phenolate ring. In the crystal, molecules are linked into screw chains by weak C—H...F hydrogen bonds. Additional C—H...π contacts arrange the molecules into sheets parallel to theacplane.

scholarly journals {4,5-Dimethoxy-2-[(2,3-η)-2-prop-2-en-1-yl]phenyl-κC1}(8-hydroxyquinolinato-κN,O)platinum(II)

IUCrData ◽  
2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Thi Yen Hang Bui ◽  
Chi Nguyen Thi Thanh ◽  
Luc Van Meervelt
Keyword(s):  
Crystal Structure ◽  
Double Bond ◽  
Hydrogen Bonds ◽  
Least Squares ◽  
Human Cancer ◽  
Title Complex ◽  
Human Cancer Cell ◽  
Coordination Environment ◽  
Human Cancer Cell Lines ◽  
Square Planar

The crystal structure of the organoplatinum(II) title complex, [Pt(C9H6NO)(C11H13O2)] or [Pt(methyleugenol)(8-hydroxyquinolinato)], has been determined in order to verify the coordination environment of the PtIIcation, which was found to be square-planar with the N and O atoms of the quinolinate ligandcisandtrans, respectively, with respect to the ethylenic double bond. The least-squares planes through the two aromatic ring systems make an angle of 39.87 (10)°. In the crystal, chains are formed parallel to [100] sustained by C—H...O hydrogen bonds. Parallel chains further interactviaC—H...O and C—H...π contacts. The complex shows interesting activity on four human cancer cell lines with IC50values between 1.92 and 4.86 µM.

scholarly journals Crystal structure of bis(2-{1-[(E)-(4-fluorobenzyl)imino]ethyl}phenolato-κ2N,O)palladium(II)

2015 ◽  
Vol 71 (4) ◽  
pp. 350-353
Author(s):  
Amalina Mohd Tajuddin ◽  
Hadariah Bahron ◽  
Hamizah Mohd Zaki ◽  
Karimah Kassim ◽  
Suchada Chantrapromma
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Complex ◽  
Asymmetric Unit ◽  
Schiff Base Ligands ◽  
Bond Lengths ◽  
Square Planar ◽  
Coordination Plane

The asymmetric unit of the title complex, [Pd(C15H13FNO)2], contains one half of the molecule with the PdIIcation lying on an inversion centre and is coordinated by the bidentate Schiff base anion. The geometry around the cationic PdIIcentre is distorted square planar, chelated by the imine N- and phenolate O-donor atoms of the two Schiff base ligands. The N- and O-donor atoms of the two ligands are mutuallytrans, with Pd—N and Pd—O bond lengths of 2.028 (2) and 1.9770 (18) Å, respectively. The fluorophenyl ring is tilted away from the coordination plane and makes a dihedral angle of 66.2 (2)° with the phenolate ring. In the crystal, molecules are linked into chains along the [101] direction by weak C—H...O hydrogen bonds. Weak π–π interactions with centroid–centroid distances of 4.079 (2) Å stack the molecules alongc.

scholarly journals Bis{benzyl 2-[4-(4-methoxyphenyl)butan-2-ylidene]hydrazinecarbodithioato-κ2 N 2,S}nickel(II)

2012 ◽  
Vol 68 (6) ◽  
pp. m725-m726 ◽  
Author(s):  
Ming-Yueh Tan ◽  
Thahira Begum S. A. Ravoof ◽  
Mohamed Ibrahim Mohamed Tahir ◽  
Karen A. Crouse ◽  
Edward R. T. Tiekink
Keyword(s):  
Least Squares ◽  
Dihedral Angle ◽  
Crystal Packing ◽  
Chelate Ring ◽  
Title Complex ◽  
Planar Geometry ◽  
Square Planar ◽  
Supramolecular Chains ◽  
Chelate Rings

The complete molecule of the title complex, [Ni(C19H21N2OS2)2], is generated by the application of twofold symmetry. The NiII atom is N,S-chelated by two hydrazinecarbodithioate ligands, which provide an N2S2 donor set that defines a distorted square-planar geometry, the S atoms being approximately cis. The conformation of the chelate ring is an envelope with the NiII atom being the flap atom. The dihedral angle between the least-squares planes through the chelate rings = 30.10 (6)°. Supramolecular chains propagated by glide symmetry along the c axis and mediated by C—H...N contacts feature in the crystal packing.

scholarly journals cis-(Di-2-pyridylamine-κ2N2,N2′)bis(thiocyanato-κS)platinum(II)

2012 ◽  
Vol 68 (4) ◽  
pp. m440-m440
Author(s):  
Kwang Ha
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Complex ◽  
Complex Molecules ◽  
Square Planar ◽  
Supramolecular Chains ◽  
Planar Environment

In the title complex, [Pt(NCS)2(C10H9N3)], the PtIIion is four-coordinated in a distorted square-planar environment by the two pyridine N atoms of the chelating di-2-pyridylamine (dpa) ligand and two mutuallycisS atoms from two linear thiocyanate anions. The dpa ligand is not planar, the dihedral angle between the pyridine rings being 30.8 (4)°. In the crystal, the complex molecules are stacked in columns along theaaxis and are connected by intermolecular N—H...N hydrogen bonds, forming supramolecular chains along thebaxis.

scholarly journals Crystal structure of bis[1-(4-bromobenzyl)pyridinium] bis(1,2-dicyanoethene-1,2-dithiolato-κ2S,S′)nickelate(II)

2014 ◽  
Vol 70 (12) ◽  
pp. m395-m396
Author(s):  
Dong Zeng ◽  
Shui-Bin Yang ◽  
Zheng-Fang Tian
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Asymmetric Unit ◽  
Coordination Environment ◽  
Pyridinium Cation ◽  
Square Planar ◽  
Benzene Rings

The asymmetric unit of the title salt, (C12H11BrN)2[Ni(C4N2S2)2], consists of one 1-(4-bromobenzyl)pyridinium cation and one half of a complex [Ni(mnt)2]2−(mnt2−is the maleonitriledithiolate dianion). The Ni2+ion is located on an inversion centre and is coordinated by four S atoms from two mnt2−ligands, exhibiting a square-planar coordination environment. In the cation, the planes of the pyridinium and benzene rings make a dihedral angle of 69.86 (19)°. The cations and anions are alternately arranged in layers parallel to (001) and are held together by non-classical C—H...N hydrogen bonds.

scholarly journals 5-{[1-(2,4-Dichlorophenyl)-1H-1,2,3-triazol-4-yl]methyl}-5H-dibenz[b,f]azepine

IUCrData ◽  
2016 ◽  
Vol 1 (2) ◽  
Author(s):  
K. S. Vinay Kumar ◽  
Chandra ◽  
B. M. Rajesh ◽  
M. Mahendra ◽  
M. P. Sadashiva
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Triazole Ring ◽  
Dihedral Angles ◽  
Boat Conformation ◽  
Compound C ◽  
Benzene Rings

In the molecule of the title compound, C23H16Cl2N4, the dihedral angle between the benzene rings fused to the azepine ring is 52.00 (6)°. The plane of the triazole ring makes dihedral angles of 74.40 (5), 25.56 (8) and 44.78 (6)° with the planes of the benzene rings of the dibenzoazepine moiety and the dichlorophenyl ring, respectively. The azepine ring adopts a boat conformation. There are no classical hydrogen bonds in the crystal.

scholarly journals A second monoclinic polymorph for 3-amino-1-(4-methoxyphenyl)-9,10-dihydrophenanthrene-2,4-dicarbonitrile

2012 ◽  
Vol 68 (4) ◽  
pp. o1157-o1158
Author(s):  
Abdullah M. Asiri ◽  
Hassan M. Faidallah ◽  
Khalid A. Alamry ◽  
Seik Weng Ng ◽  
Edward R. T. Tiekink
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Dihedral Angles ◽  
Boat Conformation ◽  
Asymmetric Unit ◽  
Acta Cryst ◽  
Compound C ◽  
Benzene Rings ◽  
Independent Molecules

The title compound, C23H17N3O, has been previously described in a monoclinicP21/cpolymorph withZ= 4 [Asiri, Al-Youbi, Faidallah, Ng & Tiekink (2011).Acta Cryst. E67, o2449]. In the new monoclinicP21/nform, withZ= 8, there are two independent molecules,AandB, in the asymmetric unit. In both molecules, the cyclohexa-1,3-diene ring has a screw-boat conformation, whereas it is a distorted half-chair in the original polymorph. There is a fold in each molecule, as indicated by the dihedral angle between the benzene rings of the 1,2-dihydronaphthalene and aniline residues of 33.19 (10)° (moleculeA) and 30.6 (10)° (moleculeB). The methoxybenzene ring is twisted out of the plane of the aniline residue to which it is connected [dihedral angles = 49.22 (10) and 73.27 (10)°, inAandBrespectively]. In the crystal, the two independent molecules self-associateviaN—H...N hydrogen bonds, generating a 12-membered {...HNC3N}2synthon. These are connected into a supramolecular tape in the (-101) plane by N—H...O(methoxy) interactions. In theP21/cpolymorph, supramolecular layers are formed by N—H...N and N—H...O interactions.

scholarly journals Dibromido(di-2-pyridylamine-κ2N2,N2′)platinum(II)

2012 ◽  
Vol 68 (4) ◽  
pp. m453-m453 ◽  
Author(s):  
Kwang Ha
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Complex ◽  
Complex Molecules ◽  
Π Interactions ◽  
Square Planar ◽  
Planar Environment

The PtIIion in the title complex, [PtBr2(C10H9N3)], is four-coordinated in an essentially square-planar environment by two N atoms from a chelating di-2-pyridylamine (dpa) ligand and two Br−anions. The dpa ligand is not planar, with the dihedral angle between the pyridine rings being 40.8 (2)°. The complex molecules are stacked in columns along [001] through π–π interactions between the pyridine rings [centroid–centroid distances = 3.437 (3) and 3.520 (3) Å]. Intermolecular N—H...Br hydrogen bonds connect the molecules into chains running along [010]. Intramolecular C—H...Br interactions are also observed.

Sign in / Sign up

Export Citation Format

Share Document