scholarly journals Structure and Photophysics of 2-(2‘-Pyridyl)benzindoles:  The Role of Intermolecular Hydrogen Bonds

2007 ◽  
Vol 111 (45) ◽  
pp. 11400-11409 ◽  
Author(s):  
Irina Petkova ◽  
Maria S. Mudadu ◽  
Ajay Singh ◽  
Randolph P. Thummel ◽  
Ivo H. M. van Stokkum ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Intermolecular Hydrogen Bonds

The role of intermolecular hydrogen bonds in the decomposition of hydrocarbon hydroperoxides

1974 ◽  
Vol 8 (1) ◽  
pp. 109-111
Author(s):  
O. P. Yablonskii ◽  
V. F. Bystrov ◽  
V. A. Belyaev ◽  
A. N. Vinogradov
Keyword(s):  
Hydrogen Bonds ◽  
Intermolecular Hydrogen Bonds

scholarly journals The Crucial Role of Conserved Intermolecular H-bonds Inaccessible to the Solvent in Formation and Stabilization of the TL5·5 SrRNA Complex

2005 ◽  
Vol 280 (16) ◽  
pp. 16151-16156 ◽  
Author(s):  
George M. Gongadze ◽  
Alexey P. Korepanov ◽  
Elena A. Stolboushkina ◽  
Natalia V. Zelinskaya ◽  
Anna V. Korobeinikova ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Ribosomal Proteins ◽  
Rna Binding ◽  
Thermus Thermophilus ◽  
Site Directed Mutagenesis ◽  
Amino Acid Residues ◽  
Intermolecular Hydrogen Bonds ◽  
Conserved Residues ◽  
The Stability

Analysis of the structures of two complexes of 5 S rRNA with homologous ribosomal proteins,Escherichia coliL25 andThermus thermophilusTL5, revealed that amino acid residues interacting with RNA can be divided into two different groups. The first group consists of non-conserved residues, which form intermolecular hydrogen bonds accessible to solvent. The second group, comprised of strongly conserved residues, form intermolecular hydrogen bonds that are shielded from solvent. Site-directed mutagenesis was used to introduce mutations into the RNA-binding site of protein TL5. We found that replacement of residues of the first group does not influence the stability of the TL5·5 S rRNA complex, whereas replacement of residues of the second group leads to destabilization or disruption of the complex. Stereochemical analysis shows that the replacements of residues of the second group always create complexes with uncompensated losses of intermolecular hydrogen bonds. We suggest that these shielded intermolecular hydrogen bonds are responsible for the recognition between the protein and RNA.

Structural Isomerism in Crystals of Redox-Active Secondaryortho-Diamides: The Role of Competing Intra- and Intermolecular Hydrogen Bonds in Directing Crystalline Topologies

2004 ◽  
Vol 10 (18) ◽  
pp. 4498-4511 ◽  
Author(s):  
St�phane A. Baudron ◽  
Narcis Avarvari ◽  
Enric Canadell ◽  
Pascale Auban-Senzier ◽  
Patrick Batail
Keyword(s):  
Hydrogen Bonds ◽  
Intermolecular Hydrogen Bonds ◽  
Structural Isomerism ◽  
Redox Active

scholarly journals Role of Halogen Substituents on Halogen Bonding in 4,5-DiBromohexahydro-3a,6-Epoxyisoindol-1(4H)-ones

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 112
Author(s):  
Atash V. Gurbanov ◽  
Dmitriy F. Mertsalov ◽  
Fedor I. Zubkov ◽  
Maryana A. Nadirova ◽  
Eugeniya V. Nikitina ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Halogen Bond ◽  
Halogen Bonding ◽  
Halogen Bonds ◽  
Intermolecular Hydrogen Bonds ◽  
3D Structures ◽  
Supramolecular Architectures

A series of 4,5-dibromo-2-(4-substituted phenyl)hexahydro-3a,6-epoxyisoindol-1(4H)-ones were synthesized by reaction of the corresponding 2-(4-substituted phenyl)-2,3,7,7a-tetrahydro-3a,6-epoxyisoindol-1(6H)-ones with [(Me2NCOMe)2H]Br3 in dry chloroform under reflux for 3−5 h. In contrast to the 4-F and 4-Cl substituents, one of the bromine atoms of the isoindole moiety behaves as a halogen bond donor in the formation of intermolecular halogen bonding in the 4-H, 4-Br and 4-I analogues. Not only intermolecular hydrogen bonds, but also Ha⋯Ha and Ha⋯π types of halogen bonds in the 4-H, 4-Br, and 4-I compounds, contribute to the formation of supramolecular architectures leading to 2D or 3D structures.

A Crystallographic Study of Bis[S-benzyl-5-bromo-2-oxoindolin-3-ylidenemethanehydrazonthioate] Disulfide Solvated with Dimethylsulfoxide

2012 ◽  
Vol 9 (2) ◽  
pp. 87
Author(s):  
Mohd Abdul Fatah Abdul Manan ◽  
M. Ibrahim M. Tahir ◽  
Karen A. Crouse ◽  
Fiona N.-F. How ◽  
David J. Watkin
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Solvent Molecule ◽  
Site Occupancy ◽  
Unit Cell Parameters ◽  
Intermolecular Hydrogen Bonds ◽  
Triclinic Space Group ◽  
Cell Parameters ◽  
Crystallographic Study ◽  
Thiol Form

The crystal structure of the title compound has been determined. The compound crystallized in the triclinic space group P -1, Z = 2, V = 1839 .42( 18) A3 and unit cell parameters a= 11. 0460( 6) A, b = 13 .3180(7) A, c=13. 7321 (8) A, a = 80.659(3 )0, b = 69 .800(3 )0 and g = 77 .007 (2)0 with one disordered dimethylsulfoxide solvent molecule with the sulfur and oxygen atoms are distributed over two sites; S101/S102 [site occupancy factors: 0.6035/0.3965] and 0130/0131 [site occupancy factor 0.3965/0.6035]. The C22-S2 l and C 19-S20 bond distances of 1. 779(7) A and 1. 788(8) A indicate that both of the molecules are connected by the disulfide bond [S20-S21 2.055(2) A] in its thiol form. The crystal structure reveals that both of the 5-bromoisatin moieties are trans with respect to the [S21-S20 and CI 9-Nl 8] and [S20-S21 and C22-N23] bonds whereas the benzyl group from the dithiocarbazate are in the cis configuration with respect to [S21-S20 and C19-S44] and [S20-S21 and C22-S36] bonds. The crystal structure is further stabilized by intermolecular hydrogen bonds of N9-H35···O16 formed between the two molecules and N28-H281 ···O130, N28-H281 ···O131 and C4 l-H4 l l ···O 131 with the solvent molecule.

scholarly journals Organotin(IV) selenate derivatives – Crystal structure of [{(Ph3Sn)2SeO4} ⋅ CH3OH] n

2021 ◽  
Vol 44 (1) ◽  
pp. 213-217
Author(s):  
Waly Diallo ◽  
Hélène Cattey ◽  
Laurent Plasseraud
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Hydrogen Bonds ◽  
Point Of View ◽  
Intermolecular Hydrogen Bonds

Abstract Crystallization of [(Ph3Sn)2SeO4] ⋅ 1.5H2O in methanol leads to the formation of [{(Ph3Sn)2SeO4} ⋅ CH3OH] n (1) which constitutes a new specimen of organotin(IV) selenate derivatives. In the solid state, complex 1 is arranged in polymeric zig-zag chains, composed of alternating Ph3Sn and SeO4 groups. In addition, pendant Ph3Sn ⋅ CH3OH moieties are branched along chains according to a syndiotactic organization and via Sn-O-Se connections. From a supramolecular point of view, intermolecular hydrogen bonds established between the selenate groups (uncoordinated oxygen) and the hydroxyl functions (CH3OH) of the pendant groups link the chains together.

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