scholarly journals The role of acid in the formation of hydrogen-bonded networks featuring 4,4′-dicarboxy-2,2′-bipyridine (H2dcbp): Synthesis, structural and magnetic characterisation of {[Cu(H2dcbp)Cl2]·H2O}2and [Cu(H2dcbp)(NO3)2(H2O)]

CrystEngComm ◽  
2005 ◽  
Vol 7 (13) ◽  
pp. 90-95 ◽  
Author(s):  
Eithne Tynan ◽  
Paul Jensen ◽  
Anthea C. Lees ◽  
Boujemaa Moubaraki ◽  
Keith S. Murray ◽  
...  
Keyword(s):  
Hydrogen Bonded

X-ray and synchrotron diffraction studies of 2-(pyridin-2-yl)-1,10-phenanthroline in the role of ligand for two copper polymorphs or hydrogen bonded with 2,2,6,6-tetramethyl-4-oxopiperidinium hexafluorophosphate

2013 ◽  
Vol 69 (5) ◽  
pp. 498-502 ◽  
Author(s):  
Jeanette A. Krause ◽  
Daoli Zhao ◽  
Sayandev Chatterjee ◽  
Bonnie M. Yeung ◽  
William B. Connick ◽  
...  
Keyword(s):  
Synchrotron Diffraction ◽  
Face To Face ◽  
Monoclinic Form ◽  
Pyramidal Geometry ◽  
Crystallization Conditions ◽  
Acidic Conditions ◽  
Square Pyramidal Geometry ◽  
Triclinic Form ◽  
Hydrogen Bonded

Different extended packing motifs of dichlorido[2-(pyridin-2-yl)-1,10-phenanthroline]copper(II), [CuCl2(C17H11N3)], are obtained, depending on the crystallization conditions. A triclinic form, (I), is obtained from dimethylformamide–diethyl ether or methanol, whereas crystallization from dimethylformamide–water yields a monoclinic form, (II). In each case, the CuIIcentre is in a five-coordinate distorted square-pyramidal geometry. The extended packing for both forms can be described as a highly offset π-stacking arrangement, with interlayer distances of 3.674 (3) and 3.679 (3) Å for forms (I) and (II), respectively. The reaction of diprotonated Pt(tmpip2NCN)Cl [tmpip2NCN = 2,6-bis(2,2,6,6-tetramethylpiperidylmethyl)benzyl] with AgPF6under acidic conditions, followed by the addition of 2-(pyridin-2-yl)-1,10-phenanthroline, results in a hydrogen-bonded cocrystal, 2,2,6,6-tetramethyl-4-oxopiperidinium hexafluorophosphate–2-(pyridin-2-yl)-1,10-phenanthroline (1/1), C9H18NO+·PF6−·C17H11N3, (III). The extended packing maximizes π–π interactions in a parallel face-to-face arrangement, with an interlayer stacking distance of 3.4960 (14) Å.

Dual fluorescence of 4-N,N-dimethylaminopyridine. Role of hydrogen-bonded complex in the ground state

1994 ◽  
Vol 80 (1-3) ◽  
pp. 125-133 ◽  
Author(s):  
C. Cazeau-Dubroca ◽  
G. Nouchi ◽  
M. Ben Brahim ◽  
M. Pesquer ◽  
D. Grose ◽  
...  
Keyword(s):  
Ground State ◽  
Dual Fluorescence ◽  
Hydrogen Bonded

Role of crystallization water molecules on hydrogen-bonded structures and dielectric phase transitions in amino trimethylene phosphonic acid-based crystals

2017 ◽  
Vol 41 (12) ◽  
pp. 5142-5150 ◽  
Author(s):  
Yu-Ling Sun ◽  
Bei-Bei Zheng ◽  
Wen Zhang
Keyword(s):  
Phase Transitions ◽  
Water Molecule ◽  
Phosphonic Acid ◽  
Water Molecules ◽  
Crystallization Water Molecule ◽  
Crystallization Water ◽  
Organic Salts ◽  
Dielectric Phase ◽  
Hydrogen Bonded

Amino trimethylene phosphonic acid-based organic salts show crystallization water molecule-triggered dielectric transitions and relaxations.

A hydrogen-bonded organic framework based on redox-active tri(dithiolylidene)cyclohexanetrione

2021 ◽  
Author(s):  
Kilingaru I. Shivakumar ◽  
Shin-ichiro Noro ◽  
Yuna Yamaguchi ◽  
Yusuke Ishigaki ◽  
Akinori Saeki ◽  
...  
Keyword(s):  
Crucial Role ◽  
Bite Angle ◽  
Redox Active ◽  
Porous Architecture ◽  
Organic Framework ◽  
Hydrogen Bonded

The porous architecture derived from a tri(dithiolylidene)cyclohexanetrione derivative reveals the crucial role of bite angle (θ) in designing the hydrogen-bonded organic frameworks (HOFs).

scholarly journals DFT investigation of role of N – H⋯O and N – H⋯π interactions in the stabilization of the hydrogen bonded complexes of anisole with aromatic amines

Heliyon ◽  
2019 ◽  
Vol 5 (7) ◽  
pp. e02155 ◽  
Author(s):  
Anil Singh Rajpurohit ◽  
R. Rajesh ◽  
R. Raj Muhamed ◽  
M. Jaccob ◽  
A. Justin Adaikala Baskar ◽  
...  
Keyword(s):  
Aromatic Amines ◽  
Π Interactions ◽  
Bonded Complexes ◽  
Hydrogen Bonded

scholarly journals Role of vibrational anharmonicity in atmospheric radical hydrogen-bonded complexes

2009 ◽  
Vol 11 (30) ◽  
pp. 6377 ◽  
Author(s):  
M. Torrent-Sucarrat ◽  
J. M. Anglada ◽  
J. M. Luis
Keyword(s):  
Vibrational Anharmonicity ◽  
Bonded Complexes ◽  
Hydrogen Bonded

Compressibility to 7 GPa at 298 K of the protonated octahedral framework mineral burtite, CaSn(OH)6

2002 ◽  
Vol 66 (3) ◽  
pp. 431-440 ◽  
Author(s):  
M. D. Welch ◽  
W. A. Crichton
Keyword(s):  
Hydrogen Bonding ◽  
Equation Of State ◽  
Major Effect ◽  
Third Order ◽  
Space Group ◽  
X Ray ◽  
The Difference ◽  
Murnaghan Equation ◽  
Hydrogen Bonded

AbstractThe equation of state of synthetic deuterated burtite, CaSn(OD)6, has been determined to 7.25 GPa at 298 K by synchrotron X-ray powder diffraction. Fitting to a third-order Birch-Murnaghan equation of state gives K0 = 44.7(9) GPa and K0′ = 5.3(4). A second-order fit gives K0 = 47.4(4) GPa. Within experimental error the two fits are indistinguishable over the pressure range studied. The decrease in the a parameter with pressure is smooth and no phase transitions were observed. Burtite is much more compressible (by a factor of three or four) than CaSnO3 and CdSnO3 perovskites, indicating that the absence of a cavity cation has a major effect upon the compressibility of the octahedral framework. Burtite is also markedly more compressible than the closely-related mineral stottite FeGe(OH)6 (K0 = 78 GPa). Their different compressibilities correlate with the relative compressibilities of stannate and germanate perovskites. Although different octahedral compressions are likely to be the primary reason for the different compressibilities of burtite and stottite, we also consider the possible secondary role of hydrogen-bonding topology in affecting the compressibilities of protonated octahedral frameworks. Burtite and stottite have different hydrogen-bonding topologies due to their different octahedral-tilt system. Burtite, space group Pn3̄ and tilt system a+a+a+, has a hydrogen-bonded network of linked four-membered rings of O-H…O linkages, whereas stottite, space group P42/n and tilt system a+a+c−, has <100> O-H…O crankshafts and isolated four-membered rings. These different hydrogen-bonded configurations lead to different bracing of the empty cavity sites by the O-H…O linkages and very different hydrogen-bonding connectivities in these two minerals that may also enhance the difference between their compressibilities.

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