New zinc(II), palladium(II) and platinum(II) complexes of dl-piperidine-2-carboxylic acid; X-ray crystal structure of trans-[Zn2(μ-Ca)2(Hpa)2Cl6] and anticancer activity of some complexes

2013 ◽  
Vol 1036 ◽  
pp. 161-167 ◽  
Author(s):  
Afaf A. Alie El-Deen ◽  
Abd El-Monem E. El-Askalany ◽  
Ruba Halaoui ◽  
Bertrand J. Jean-Claude ◽  
Ian S. Butler ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Carboxylic Acid ◽  
Anticancer Activity ◽  
X Ray

A MOF based on a lead(II) 2-oxido-6-methylpyridine-4-carboxylate network

2020 ◽  
Vol 75 (4) ◽  
pp. 365-369
Author(s):  
Long Tang ◽  
Yu Pei Fu ◽  
Na Cui ◽  
Ji Jiang Wang ◽  
Xiang Yang Hou ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Carboxylic Acid ◽  
Thermogravimetric Analysis ◽  
Metal Organic Framework ◽  
X Ray Diffraction ◽  
X Ray ◽  
Connected Node ◽  
Metal Organic ◽  
Solid State Fluorescence

AbstractA new metal-organic framework, [Pb(hmpcaH)2]n (1), has been hydrothermally synthesized from Pb(OAc)2 · 3H2O and 2-hydroxy-6-methylpyridine-4-carboxylic acid (hmpcaH2; 2), and characterized by IR spectroscopy, elemental and thermogravimetric analysis, and single-crystal X-ray diffraction. In complex 1, each hmpcaH− ligand represents a three-connected node to combine with the hexacoordinated Pb(II) ions, generating a 3D binodal (3,6)-connected ant network. The crystal structure of 2 was determined. The solid-state fluorescence properties of 1 and 2 were investigated.

Mono- and dioxido-vanadium(V) complexes of a tridentate ONO Schiff base ligand: Synthesis, spectral characterization, X-ray crystal structure, and anticancer activity

Polyhedron ◽  
2015 ◽  
Vol 93 ◽  
pp. 99-105 ◽  
Author(s):  
S. Yousef Ebrahimipour ◽  
Iran Sheikhshoaie ◽  
Anna Christin Kautz ◽  
Mojgan Ameri ◽  
Hamzeh Pasban-Aliabadi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Anticancer Activity ◽  
Schiff Base Ligand ◽  
Spectral Characterization ◽  
X Ray ◽  
Ligand Synthesis

A New Supramolecular Synthon Using N-Methylaniline. The Crystal Structure of the 1 : 1 Adduct of N-Methylaniline with 5-Nitrofuran-2-carboxylic Acid

1998 ◽  
Vol 51 (9) ◽  
pp. 867 ◽  
Author(s):  
Daniel E. Lynch ◽  
Lisa C. Thomas ◽  
Graham Smith ◽  
Karl A. Byriel ◽  
Colin H. L. Kennard
Keyword(s):  
Crystal Structure ◽  
Carboxylic Acid ◽  
Proton Transfer ◽  
Single Crystal ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Supramolecular Synthon ◽  
X Ray ◽  
C 23 ◽  
A Cell

The crystal structure of the 1 : 1 adduct of N-methylaniline with 5-nitrofuran-2-carboxylic acid has been determined by single-crystal X-ray diffraction. Crystals are monoclinic, space group P21/c with Z 4 in a cell of dimensions a 8·467(5), b 6·106(2), c 23·95(1) Å, β 94·48(3)°. The molecules associate in a tetrameric, proton-transfer formation which has potential as a new supramolecular synthon.

The Crystal Structure of Acifluorfen {5-[2-Chloro-4-(trifluoromethyl)-phenoxy]-2-nitrobenzoic Acid}

1987 ◽  
Vol 40 (6) ◽  
pp. 1131 ◽  
Author(s):  
CHL Kennard ◽  
G Smith ◽  
T Hari
Keyword(s):  
Crystal Structure ◽  
Carboxylic Acid ◽  
Phenyl Ring ◽  
Acid Group ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Carboxylic Acid Group ◽  
X Ray ◽  
Nitrobenzoic Acid ◽  
Cell Dimensions

The crystal structure of the herbicide acifluorfen (5-[(2-chloro-4-trifluoromethyl)]phenoxy-2- nitrobenzoic acid] has been determined by X-ray diffraction and refined to a residual of 0.051for 1124 observed reflections. Crystals are monoclinic, space group C2/c with cell dimensions a 26.848(7), b 8 .O29(2), c 19 .Ol4(6) �, ,R l34.72(2)� and Z 8. The molecules form centrosymmetric hydrogen-bonded cyclic dimers [O---0, 2.637(7) �] with the carboxylic acid group and the phenoxy group synclinally related to the first phenyl ring while the nitro substituent isessentially coplanar with the ring.

The methylgallium-2-carboxylatobenzimidazolato hexamer, [MeGa·C8H4N2O2]6·C6H6·(Me2C6H4)2; synthesis and X-ray crystal structure

1999 ◽  
Vol 77 (4) ◽  
pp. 434-438 ◽  
Author(s):  
Steven J Rettig ◽  
Alan Storr ◽  
James Trotter
Keyword(s):  
Crystal Structure ◽  
Carboxylic Acid ◽  
Room Temperature ◽  
Direct Methods ◽  
Membered Ring ◽  
Coordination Geometry ◽  
Temperature Reaction ◽  
Full Matrix ◽  
X Ray ◽  
Solvent Molecules

The room-temperature reaction of Me3Ga with benzimidazole 2-carboxylic acid in xylene solvent has yielded a novel crystalline hexameric gallium compound with "MeGa" moieties bridged by the doubly depronotated ligand precursor. Crystals of [MeGa(4,5-benzimidazolato-2-carboxylato)]6·(C6H6)·(m-Me2C6H4)2 are monoclinic, a = 18.091(2), b = 17.094(2), c = 13.2215(5) Å, Z = 2, space group C2/m. The structure was solved by direct methods and refined by full-matrix least-squares procedures to R (F, I [Formula: see text] 3σ(I)) = 0.064 (Rw (F2, all data) = 0.134). The hexameric Ga complex contains a six-membered ring of Ga atoms, bridged by the benzimidazolate ligands with the benzo rings projecting alternately above and below the Ga plane, thus forming a ball-shaped molecule. The complex could have ideal D3d symmetry, but it contains an encapsulated molecule of benzene, which distorts the regularity of the Ga6 hexagon, and reduces the symmetry of the complex to the crystallographically observed C2h. The coordination geometry at each of the two independent GaO2N2C centres approximates a trigonal bipyramid, with a N2C trigonal plane, and the O atoms above and below; average dimensions are Ga-O = 2.176(2), Ga-N = 1.973(3), Ga-C = 1.927(5) Å, O-Ga-O = 165°. The unit cell also contains four m-xylene solvent molecules (outside the molecular cage).Key words: gallium, crystal structure, benzene intercalate, benzimidazolecarboxylic acid.

scholarly journals Synthesis, Crystal Structure and Magnetic Behaviour of Novel 4f-2s Heterometalic One-Dimensional Coordination Polymers on the Base of 2-Furan-Carboxylic Acid

2009 ◽  
Vol 4 (2) ◽  
pp. 60-67
Author(s):  
Silvia Melnic ◽  
Denis Prodius ◽  
Sergiu Shova ◽  
Helen Stoeckli-Evans ◽  
Yurii Simonov ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Carboxylic Acid ◽  
Ir Spectra ◽  
Single Crystal ◽  
General Formula ◽  
Coordination Polymers ◽  
Magnetic Behaviour ◽  
One Dimensional ◽  
X Ray

Nine new complexes with the general formula {[Ln2Ba(α-Fur)8(H2O)4]}n, where Ln = Nd3+, Sm3+, Eu3+, Pr3+, Gd3+, Tb3+, Ho3+, Er3+ and La3+; α-Fur ≡ C4H3OCOO, were synthesized and characterized by IR spectra, magnetism, X-ray single crystal and powder diffractions.

Transformation of the Carboxyl Group of an Amino Acid to Variously Substituted Imidazoles through a Davidson-Type Heterocyclization

Synthesis ◽  
2019 ◽  
Vol 51 (09) ◽  
pp. 1961-1968 ◽  
Author(s):  
Jim Küppers ◽  
Michaela Hympánová ◽  
Tim Keuler ◽  
Andreas Schneider ◽  
Gregor Schnakenburg ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Amino Acids ◽  
Amino Acid ◽  
Carboxylic Acid ◽  
Building Blocks ◽  
Carboxyl Group ◽  
Amino Group ◽  
Combinatorial Approach ◽  
X Ray ◽  
Imidazole Derivatives

The modification of amino acids leads to valuable building blocks for the synthesis of bioactive compounds. By keeping the amino group protected, the carboxylic acid functionality can be converted in two steps into an imidazole moiety via a Davidson-like heterocyclization. This reaction allows for a combinatorial approach, in which two positions at the heterocycle can be modified. Herein, we report the synthesis of such imidazole derivatives by employing N-protected cyclohexylalanine as the starting material. Different α-halo ketones were used and two points of diversity, positions 4 and 5, were examined. The structure of the final imidazole derivatives was confirmed by three X-ray crystal structure analyses and their protease inhibiting activities were evaluated.

Designing Linear Hydrogen-Bonded Arrays by Using Substituted Charge-Transfer Complexes. The Crystal Structure of the 1 : 1 Adduct of Indole-2-carboxylic Acid with 3,5-Dinitrobenzoic Acid

1998 ◽  
Vol 51 (11) ◽  
pp. 1019 ◽  
Author(s):  
Daniel E. Lynch ◽  
Graham Smith ◽  
Karl A. Byriel ◽  
Colin H. L. Kennard
Keyword(s):  
Crystal Structure ◽  
Carboxylic Acid ◽  
Second Harmonic ◽  
Charge Transfer Complexes ◽  
Benzoic Acids ◽  
X Ray Diffraction ◽  
X Ray ◽  
Linear Optical Properties ◽  
Substituted Benzoic Acids ◽  
Indole 3 Acetic Acid

Five adducts consisting of carboxylic acid-substituted indoles with nitro-substituted benzoic acids have been synthesized and tested for second-order non-linear optical properties. These were indole-2-carboxylic acid with 2,4-dinitrobenzoic acid (1), 3,5-dinitrobenzoic acid (2), and 2,4,6-trinitrobenzoic acid (3), and indole-3-acetic acid with 3,5-dinitrobenzoic acid (4), and 2,4,6-trinitrobenzoic acid (5). Compound (2) produced clear, yellow crystals (space group P -1 with a 6·8400(7), b 15·150(2), c 16·097(2) Å, α 84·911(9), β 87·088(10), γ 77·865(9)°, Z 4) which allowed the structure to be determined by X-ray diffraction. Of the five adducts, compounds (3) and (5) gave second harmonic intensities of 0·15 and 0·16 times respectively that of a urea standard.

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