An unusual six-membered chelate ring involving carboxylic function to copper(II) coordination: synthesis, crystal structure, and properties of aqua(((2-carboxyethyl)imino)diacetato)copper(II)

1987 ◽  
Vol 26 (15) ◽  
pp. 2365-2369 ◽  
Author(s):  
Nguyen Huy Dung ◽  
B. Viossat ◽  
A. Busnot ◽  
J. M. Gonzalez Perez ◽  
S. Gonzalez Gracia ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Chelate Ring ◽  
Structure And Properties ◽  
Membered Chelate Ring

Boron Chelates and Boron-Metal Chelates, X [1]. 3-(2-Hydroxyphenyl)-2,2-diphenyl-1-oxa-3-azonia-2-borata-naphthalene-methanol (1/1): Synthesis, Spectroscopic Investigations and Crystal Structure

1982 ◽  
Vol 37 (11) ◽  
pp. 1450-1455 ◽  
Author(s):  
Rudolf Allmann ◽  
Eberhard Hohaus ◽  
Stanislaw Olejnik
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Structure Analysis ◽  
Title Compound ◽  
Chelate Ring ◽  
Boron Chelates ◽  
X Ray ◽  
Membered Chelate Ring ◽  
Compound C ◽  
Overall Ratio

The title compound, C25H20BNO2 · CH3OH, was examined by UV, IR, 1H, and 13C NMK spectroscopy as well as by thermogravimetry and X-ray structure analysis (Pbnb, a = 8.815, b = 17.309, c=28.992 Å, R= 5.5%). These investigations show the six-membered chelate ring (chelate A) to exist as formulated in [2] and not as a five-membered chelate ring B. One methanol molecule connects two chelate molecules by hydrogen bonds, resulting in an overall ratio of chelate to methanol of 1 : 1.

Structural Studies of Complexes of Tridentate Terimine Systems. Crystal Structure of Bis(2,2′:6′,2′′-terpyridine)ruthenium(II) Perchlorate Hydrate, Bis(2,2′:6′,2′′-terpyridine)- osmium(II) Perchlorate Hemihydrate and Bis((1,10-phenanthrolin-2-yl)(pyridin-2-yl)amine)iron(II) Tetrafluoroborate Dihydrate

1998 ◽  
Vol 51 (12) ◽  
pp. 1131 ◽  
Author(s):  
Donald C. Craig ◽  
Marcia L. Scudder ◽  
Wendy-Anne McHale ◽  
Harold A. Goodwin
Keyword(s):  
Crystal Structure ◽  
Crystal Structures ◽  
Metal Ion ◽  
Chelate Ring ◽  
Monoclinic Space Group ◽  
Structural Studies ◽  
Triclinic Space Group ◽  
Space Group ◽  
Membered Chelate Ring ◽  
Group I

The crystal structures of bis(2,2′:6′,2″-terpyridine)ruthenium(II) perchlorate hydrate, bis(2,2′:6′,2″- terpyridine)osmium(II) perchlorate hemihydrate and bis((1,10-phenanthrolin-2-yl)(pyridin-2-yl)- amine)iron(II) tetrafluoroborate dihydrate are described. In the terpyridine complexes the ruthenium-nitrogen distances and the corresponding osmium-nitrogen distances are not significantly different. In both complexes the ligand geometry and the metal ion environment show the distortions usual for bis(terpyridine) systems. Distortions are less marked in the bis((1,10-phenanthrolin-2-yl)(pyridin-2-yl)amine)iron(II) cation in which each tridentate unit forms one five-membered and one six-membered chelate ring. [Ru(trpy)2] [ClO4]2.(H2O)1.1: tetragonal, space group I 41/a, a, b 12·527(2), c 40·202(11) Å, Z 8. [Os(trpy)2] [ClO4]2.(H2O)0·5: monoclinic, space group P 21/n, a 8·842(3), b 8·861(1), c 39·22(2) Å, β93·89(2)°, Z 4. [Fe(phpyam)2] [BF4]2.(H2O)2: triclinic, space group P -1, a 12·43(1), b 12·45(1), c 13·35(1) Å, α 62·70(10), β 78·55(8), γ 72·46(9)°, Z 2.

Synthese und Kristallstruktur von (Cyclopentadienyl)(dicarbonyl)(1,5-di-/Molyl-pentaazadienido)molybdän, (Cp)Mo(CO)2(tolN5tol)/ Synthesis and Crystal Structure of (Cyclopentadienyl)(dicarbonyl)(1,5-di-p-tolyl-pentaazadienido)molybdenum, (Cp)Mo(CO)2(tolN5tol)

1988 ◽  
Vol 43 (8) ◽  
pp. 1029-1032 ◽  
Author(s):  
Johannes Beck
Keyword(s):  
Crystal Structure ◽  
Nitrogen Atom ◽  
Metal Atom ◽  
Chelate Ring ◽  
Lattice Parameters ◽  
Monoclinic Space Group ◽  
Synthesis And Crystal Structure ◽  
Space Group ◽  
Membered Chelate Ring

Abstract(Cp)Mo(CO)2(tolN5tol) is formed in the reaction of (Cp)Mo(CO)3Cl with tolNN(NH)NNtol and NaOH in ethanol. It forms red platelike crystals from THF/hexane which crystallize in the monoclinic space group P21/n with the lattice parameters a = 765.6(2), b = 2372.3(3), c = 1149.4(2) pm, β = 97.06(2)°, Z = 4. The structure consists of monomeric complexes. The pentaazadienido ligand chelates with its nitrogen atoms N1 and N3 the Mo atom of a (Cp)Mo(CO)2 unit. The nitrogen atom N5 is not coordinated to the metal atom. Although asymmetrically bonded, the all trans N5 zig zag chain is planar. The N -N distances in the four membered chelate ring are nearly equal (N1 - N2 = 131.0 and N2 - N3 = 132.6 pm)

Bis(3-ethoxy-4-hydroxybenzaldehyde thiosemicarbazonato-κ2 S,N)nickel(II) monohydrate

2006 ◽  
Vol 62 (4) ◽  
pp. m799-m800
Author(s):  
Li-Fang Jiang ◽  
Zun-Xing Huang ◽  
Jia-Hong Chen
Keyword(s):  
Crystal Structure ◽  
Water Molecule ◽  
Title Compound ◽  
Chelate Ring ◽  
Planar Geometry ◽  
Inversion Center ◽  
Envelope Conformation ◽  
Membered Chelate Ring ◽  
Uncoordinated Water Molecule ◽  
Square Planar

In the crystal structure of the title compound, [Ni(C10H12N3O2S)2]·H2O, the NiII atom is located on an inversion center and is chelated by two hydroxyethoxybenzaldehyde thiosemicarbazonate anions in a square-planar geometry. The five-membered chelate ring assumes an envelope conformation, with the Ni atom lying at the flap position. The uncoordinated water molecule is disordered over another inversion center and is hydrogen bonded to the NiII complex.

The crystal structure of Bis(benzothiazole-2-thiolato)bis(pyridine)cobalt(II)

1977 ◽  
Vol 30 (11) ◽  
pp. 2425 ◽  
Author(s):  
IG Dance ◽  
D Isaac
Keyword(s):  
Crystal Structure ◽  
Electronic Structure ◽  
Chelate Ring ◽  
Molecular Complexes ◽  
Point Symmetry ◽  
Space Group ◽  
Membered Chelate Ring ◽  
Pyridine Nitrogen

Crystalline bis(benzothiazole-2-thiolato)bis(pyridine)cobalt(II) [Co(mbt)2(py)2] contains molecular complexes with C2 point symmetry, in which the cobalt is coordinated by two thiazole nitrogen atoms[cis, Co- N = 2.158(4) Ǻ], two mbt- exocyclic sulphur (Se) atoms [trans, Co-S = 2.595(5) Ǻ],and two pyridine nitrogen atoms [cis, Co-N = 2.120(4) Ǻ]. The N-C-S, section of mbt- is loosely coordinated to cobalt, forming a four-membered chelate ring. It is inferred from the observed dimensions that the electronic structure of coordinated mbt- is ?allylic?, N=C=Se. The crystals are orthorhombic, a 16.165(1), b 16.302(1), c 18.533(1) , Ǻ, space group Pccn, Z 8 [2 x 1/2 x Co(mbt)2(py)2],pobs 1.495, pcalc 1.495 g cm-3: Ni(mbt)2(py)2 is isostructural. The structure was obtained from 1847 observed diffractometer data (Cu Kα, θmax 55�), and refined to R 0.035, Rw 0.031.

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