scholarly journals Crystal structure of (2-acetylferrocen-1-yl)boronic acid

2019 ◽  
Vol 75 (2) ◽  
pp. 268-271
Author(s):  
Andrea Preuss ◽  
Marcus Korb ◽  
Heinrich Lang
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Boronic Acid ◽  
Molecular Packing ◽  
Centrosymmetric Dimer ◽  
Intramolecular Hydrogen Bonds ◽  
Space Group ◽  
Acetyl Group ◽  
Adjacent Molecule ◽  
Intramolecular Hydrogen

(2-Acetylferrocen-1-yl)boronic acid, [Fe(C5H5)(C7H8BO3)] or 2-C(O)CH3-1-B(OH)2–Fc [Fc = Fe(η5-C5H3)(η5-C5H5)], crystallizes in the centrosymmetric space group P21/n. The boronic acid functionality interacts via intramolecular hydrogen bonds with the acetyl group and with the –B(OH)2 functionality of an adjacent molecule. The resulting centrosymmetric dimer exhibits an anti-positioning of the ferrocenyl moieties towards the central B2O4 plane. Consequently, an (Rp ,Sp )-, i.e. a meso configuration is present for this dimer. In the crystal, weak C—H...O hydrogen bonds consolidate the molecular packing.

Crystal structure of (E)-1,2-bis(butylsulfonyl)ethylene

1989 ◽  
Vol 54 (5) ◽  
pp. 1257-1262
Author(s):  
Jaroslav Podlaha ◽  
Jana Podlahová ◽  
Jindřich Hašek
Keyword(s):  
Crystal Structure ◽  
Double Bond ◽  
Hydrogen Bonds ◽  
Characteristic Feature ◽  
Title Compound ◽  
Orthorhombic Space Group ◽  
Intramolecular Hydrogen Bonds ◽  
Space Group ◽  
Intramolecular Hydrogen

The title compound is orthorhombic, space group Pbca, a = 8.523(1), b = 17.467(3), c = 9.449(1) Å, Z = 4, R = 0 052 for 878 observed reflections. The molecule is centrosymmetric with inversion at the middle of the double bond. The characteristic feature of the structure is an almost exactly planar O-S-C(H)=C'(H')-S'-O' moiety with the H···O' and H'···O distances of 2.55 Å, indicating much more weaker intramolecular hydrogen bonds than in the related ethylsulfonyl derivative studied earlier.

3,3′-N,N′-Bis(amino)-2,2′-bipyridine — An unusually methylation-resistant amine

2011 ◽  
Vol 89 (8) ◽  
pp. 971-977
Author(s):  
Danielle M. Chisholm ◽  
Robert McDonald ◽  
J. Scott McIndoe
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Complex Mixtures ◽  
Amino Groups ◽  
Intramolecular Hydrogen Bonds ◽  
X Ray ◽  
Intramolecular Hydrogen

Methylation of aromatic amino groups is usually straightforward, but the formation of two intramolecular hydrogen bonds in 3,3′-N,N′-bis(amino)-2,2′-bipyridine and (or) the potential for ring methylation prevents the clean tetramethylation of this molecule. Numerous attempts to make 3,3′-N,N′-bis(dimethylamino)-2,2′-bipyridine produced only complex mixtures of variously methylated products, and the only isolated molecule was 3,3′-N,N′-bis(methylamino)-2,2′-bipyridine, for which an X-ray crystal structure was obtained.

scholarly journals Very Short Intramolecular Hydrogen Bonds in the Crystal Structure of 1-[Bis(4-Fluorophenyl)Methyl]Piperazinediium Dimaleate

2012 ◽  
Vol 42 (10) ◽  
pp. 1046-1051 ◽  
Author(s):  
A. S. Dayananda ◽  
Grzegorz Dutkiewicz ◽  
H. S. Yathirajan ◽  
B. Narayana ◽  
Maciej Kubicki
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Intramolecular Hydrogen Bonds ◽  
Intramolecular Hydrogen

2-(Dibenzoylamino)pyridine

2006 ◽  
Vol 62 (5) ◽  
pp. o1868-o1869 ◽  
Author(s):  
Yan-Bo Weng ◽  
Jing-Kang Wang ◽  
Yan-Fei Wang
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Intramolecular Hydrogen Bonds ◽  
Compound C ◽  
Highly Effective ◽  
Intramolecular Hydrogen

The title compound, C19H14N2O2, is a highly effective nematicide. No inter- or intramolecular hydrogen bonds are observed in the crystal structure.

The molecular and crystal structure of benzamidinium bromoacetate

1988 ◽  
Vol 53 (2) ◽  
pp. 294-300 ◽  
Author(s):  
Bohumil Kratochvíl ◽  
Jan Ondráček ◽  
Karel Malý ◽  
László Csordás
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Least Squares Method ◽  
Ion Pairs ◽  
Molecular And Crystal Structure ◽  
Monoclinic Space Group ◽  
Fourier Synthesis ◽  
Intramolecular Hydrogen Bonds ◽  
Intramolecular Hydrogen ◽  
Oxygen Atoms

The molecular and crystal structure of benzamidinium bromoacetate was solved on the basis of Patterson and Fourier synthesis. The position of all the atoms were localized and the least squares method was employed to refine the coordinates of all the atoms together with their thermal vibration parameters. A final R factor value of 0.067 was obtained for 1 349 observed reflections (I 1.96 σ(I)). The substance crystallizes in the P21/n monoclinic space group with lattice parameters of a = 1 145.7(2), b = 1 571.3(3), c = 578.3(1) pm, γ = 90.65(1)°, Z = 4. Intramolecular hydrogen bonds form ion pairs in the structure between the nitrogen atoms of the amidinium group and the oxygen atoms of the bromoacetate. Intramolecular hydrogen bonds, also between nitrogen and oxygen atoms, connect the molecules in an infinite chain. The molecular chains are joined together by van der Waals forces. The N···O distance in the hydrogen bonds varies between 280.3(8) and 284.5(8) pm.

Unusual crystal structure ofN-substituted maleamic acid – very strong effect of intramolecular hydrogen bonds

2014 ◽  
Vol 70 (6) ◽  
pp. 942-947 ◽  
Author(s):  
Raju Francis ◽  
Pallepogu Raghavaiah ◽  
Kuruvilla Pius
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Single Crystal ◽  
Amide Group ◽  
Intramolecular Hydrogen Bonds ◽  
X Ray ◽  
Planar Molecule ◽  
C And N ◽  
Maleamic Acid ◽  
Intramolecular Hydrogen

N-Carbamylmaleamic acid (malur) undergoes cyclodehydration under favourable conditions, as expected, to giveN-carbamyl maleimide.N-(Carboxymethyl) maleamic acid (malgly), however, does not undergo a similar cyclization reaction. Strong π bonding between the C and N of the amide group as well as two intramolecular hydrogen bonds makesmalglya planar molecule, as revealed by single-crystal X-ray studies.

scholarly journals Crystal structure of bis(acetato-κO)diaqua(2,2′-bipyridine-κ2N,N′)manganese(II)

2014 ◽  
Vol 70 (9) ◽  
pp. m326-m327 ◽  
Author(s):  
Natarajan Saravanan ◽  
Parasuraman Selvam
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Metal Ion ◽  
Water Molecules ◽  
Intramolecular Hydrogen Bonds ◽  
Distorted Octahedral Environment ◽  
Octahedral Environment ◽  
Π Stacking ◽  
Distorted Octahedral ◽  
Intramolecular Hydrogen

In the title monomeric manganese(II) complex, [Mn(CH3COO)2(C10H8N2)(H2O)2], the metal ion is coordinated by a bidentate 2,2′-bipyridine (bpy) ligand, two water molecules and two axial acetate anions, resulting in a highly distorted octahedral environment. The aqua ligands are stabilized by the formation of strong intramolecular hydrogen bonds with the uncoordinated acetate O atoms, giving rise to pseudo-bridging arrangement of the terminal acetate groups. In the crystal, the molecules form [010] zigzag chainsviaO—H...O hydrogen bonds involving the aqua ligands and acetate O atoms. Further, the water and bpy ligands aretransto each other, and are arranged in an off-set fashion showing intermolecular π–π stacking between nearly parallel bipy rings, the centroid–centroid separations being 3.8147 (12) and 3.9305 (13) Å.

(1E,4E)-1,5-Bis(2-chlorophenyl)penta-1,4-dien-3-one

2007 ◽  
Vol 63 (11) ◽  
pp. o4379-o4379 ◽  
Author(s):  
M. Nizam Mohideen ◽  
S. Thenmozhi ◽  
A. Subbiah Pandi ◽  
Ramalingam Murugan ◽  
S. Sriman Narayanan
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Crystal Packing ◽  
Intramolecular Hydrogen Bonds ◽  
Space Group ◽  
Compound C ◽  
Centrosymmetric Space Group ◽  
Benzene Rings ◽  
Intramolecular Hydrogen

The title compound, C17H12Cl2O, crystallizes in a centrosymmetric space group. The dihedral angle between the two benzene rings is 24.7 (1)°. The crystal packing is characterized by non-classical C—H...O and C—H...Cl inter- and intramolecular hydrogen bonds.

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