Metal complexes as ligands. IX. Crystalline binuclear complexes containing two molecules of chloroform per complex molecule, and their unsolvated analogues

1970 ◽  
Vol 23 (2) ◽  
pp. 243 ◽  
Author(s):  
RB Coles ◽  
CM Harris ◽  
E Sinn
Keyword(s):  
Hydrogen Bonding ◽  
Comparative Study ◽  
Metal Complexes ◽  
Binuclear Complex ◽  
Complex Molecule ◽  
Probable Mechanism ◽  
Crystal Habit ◽  
Binuclear Complexes ◽  
Phenyl Rings ◽  
Weak Coordination

Some new binuclear antiferromagnetic complexes of copper(11) derived from bidentate salicylaldimine ligands have been isolated with two molecules of chloroform per complex molecule. The chloroform could be driven off by heating. The chloroform-solvated complexes form as large crystals, while the unsolvated complexes are amorphous. A comparative study of the solvated and unsolvated complexes was carried out to determine the effect of the chloroform on the properties of the binuclear complex. It appears that for most properties not related to the crystal habit, the presence of the chloroform may be ignored. Thus, strong coordination of chloroform to copper atoms can be ruled out and though very weak coordination remains a possibility, it does not seem probable. The chloroform molecules may be held to the phenyl rings of the salicylaldimines by the same (weak) interaction that is known in mixtures of chloroform and benzene. The most probable mechanism of the interaction of the chloroform molecules with the complex is by weak hydrogen bonding with the two bridging salicylaldimine oxygens of the complex.

Metal complexes as ligands. X. Investigation of valency and substituent effects in binuclear complexes derived from tetradentate salicylaldimines

1972 ◽  
Vol 25 (1) ◽  
pp. 45 ◽  
Author(s):  
S Kokot ◽  
CM Harris ◽  
E Sinn
Keyword(s):  
Metal Complexes ◽  
Substituent Effects ◽  
Nickel Complexes ◽  
Magnetic Interactions ◽  
Binuclear Complexes ◽  
Electronic Effects ◽  
Metal Chlorides ◽  
Limited Sampling ◽  
Phenyl Rings ◽  
The Difference

A series of binuclear complexes has been formed by using planar copper(11) complexes (CUTSB) of tetradentate Schiff bases (TSB) as ligands to coordinate with metal chlorides. The binuclear complexes, (CuTSB)MCln (M = Cu11, Fe111, Mn11; n. = 2, 3), all exhibit pairwise antiferromagnetic interactions. The nickel complexes (NitsB)Mcln (M = FeIII, MnII) can be formed similarly, but the nickel atoms are diamagnetic so that no significant magnetic interactions are expected. The effect of 5-Cl, 5-Br, and 5,6-benzo substituents in the phenyl rings of the TSB groups on the strength of the antiferromagnetic interactions was examined in the complexes (CUTSB)CuCl2. Although the presence of a substituent usually increases the strength of the interaction, this trend is not systematic and there is no reason to attribute it to electronic effects of ring substituents. In (CUTSB)MCln, the main difference between the complexes with M = Fe111 and M = Mn11 is the difference in the valencies of the two d5 metals. In our limited sampling (one complex of each type), the interaction is stronger between iron(111) and copper(11) than between the manganese(11) and copper(11). These complexes form as hydrates, and since iron(111) and manganese(11) prefer octahedral environments, it is probable that one and two molecules of water respectively are coordinated to these metals. In the case where M = FeIII, N�ssbauer measurements indicate that this is so.

scholarly journals Crystal structure of 2-(2,4-diphenyl-3-azabicyclo[3.3.1]nonan-9-ylidene)acetonitrile

2015 ◽  
Vol 71 (10) ◽  
pp. o792-o793
Author(s):  
K. Priya ◽  
K. Saravanan ◽  
S. Kabilan ◽  
S. Selvanayagam
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Crystal Packing ◽  
Van Der Waals ◽  
Van Der Waals Forces ◽  
Chair Conformation ◽  
Equatorial Orientation ◽  
Amino Group ◽  
Phenyl Rings

In the title 3-azabicyclononane derivative, C22H22N2, both the fused piperidine and cyclohexane rings adopt a chair conformation. The phenyl rings attached to the central azabicylononane fragment in an equatorial orientation are inclined to each other at 23.7 (1)°. The amino group is not involved in any hydrogen bonding, so the crystal packing is stabilized only by van der Waals forces.

Synthesis, crystal structure, hydrogen bonding and spectroscopy of transition-metal complexes with the ligand (N,N′-bis(2-pyridylmethyl)-1,3-propanediamine)

Polyhedron ◽  
2009 ◽  
Vol 28 (14) ◽  
pp. 2813-2820 ◽  
Author(s):  
Aminou Mohamadou ◽  
Gerard A. van Albada ◽  
Ilpo Mutikainen ◽  
Urho Turpeinen ◽  
Jérôme Marrot ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes

scholarly journals Crystal structure of 2-[bis(benzylsulfanyl)methyl]-6-methoxyphenol

2020 ◽  
Vol 76 (4) ◽  
pp. 484-487
Author(s):  
Abhinav Raghuvanshi ◽  
Lena Knauer ◽  
Lydie Viau ◽  
Michael Knorr ◽  
Carsten Strohmann
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Coordination Chemistry ◽  
Title Compound ◽  
Dihedral Angles ◽  
Orthorhombic Space Group ◽  
Bridging Ligand ◽  
Compound C ◽  
Unit Form ◽  
Phenyl Rings

The title compound, C22H22O2S2, 1, represents an example of an ortho-vanillin-based functionalized dithioether, which could be useful as a potential chelating ligand or bridging ligand for coordination chemistry. This dithioacetal 1 crystallizes in the orthorhombic space group Pbca. The phenyl rings of the benzyl groups and that of the vanillin unit form dihedral angles of 35.38 (6) and 79.77 (6)°, respectively. The crystal structure, recorded at 100 K, displays both weak intramolecular O—H...O and intermolecular O—H...S hydrogen bonding.

scholarly journals Crystal structure of 2-hydroxy-2-phenylacetophenone oxime

2021 ◽  
Vol 77 (1) ◽  
pp. 66-69
Author(s):  
Nurcan Akduran
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Phenyl Ring ◽  
Crystal Packing ◽  
Hirshfeld Surface ◽  
Oxime Group ◽  
Phenyl Rings ◽  
Ring Interaction ◽  
Van Der Waals Contacts

The title compound [systematic name: 2-(N-hydroxyimino)-1,2-diphenylethanol], C14H13NO2, consists of hydroxy phenylacetophenone and oxime units, in which the phenyl rings are oriented at a dihedral angle of 80.54 (7)°. In the crystal, intermolecular O—HOxm...NOxm, O—HHydr...OHydr, O—H′Hydr...OHydr and O—HOxm...OHydr hydrogen bonds link the molecules into infinite chains along the c-axis direction. π–π contacts between inversion-related of the phenyl ring adjacent to the oxime group have a centroid–centroid separation of 3.904 (3) Å and a weak C—H...π(ring) interaction is also observed. A Hirshfeld surface analysis of the crystal structure indicates that the most important contributions for the crystal packing are from H...H (58.4%) and H...C/C...H (26.4%) contacts. Hydrogen bonding and van der Waals contacts are the dominant interactions in the crystal packing.

4-Oxo-2,3,5,6-tetraphenylpiperidine-1-carbonitrile ethyl acetate hemisolvate

2006 ◽  
Vol 62 (4) ◽  
pp. o1295-o1297
Author(s):  
J. Suresh ◽  
V. P. Alex Raja ◽  
S. Natarajan ◽  
S. Perumal ◽  
A. Mostad ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Ethyl Acetate ◽  
Title Compound ◽  
Chair Conformation ◽  
Compound C ◽  
Phenyl Rings ◽  
Space Filler ◽  
Acetate Molecule

In the title compound, C30H24N2O·0.5C4H8O2, the piperidone ring adopts the chair conformation and all the phenyl rings are equatorially oriented. The ethyl acetate molecule is present as a space filler and does not participate in the hydrogen-bonding network. The crystal structure is stabilized through C—H...N and C—H...O hydrogen bonds. No significant C—H...π and π–π interactions are observed.

Chirality Transfer from Guest Chiral Metal Complexes to Inorganic Framework: The Role of Hydrogen Bonding

2003 ◽  
Vol 9 (20) ◽  
pp. 5048-5055 ◽  
Author(s):  
Yu Wang ◽  
Jihong Yu ◽  
Yi Li ◽  
Zhan Shi ◽  
Ruren Xu
Keyword(s):  
Hydrogen Bonding ◽  
Metal Complexes ◽  
Chirality Transfer ◽  
Inorganic Framework

The role of hydrogen bonding in tuning CEST contrast efficiency: A comparative study of intra and inter molecular hydrogen bonding

2022 ◽  
Author(s):  
Shalini Pandey ◽  
Subhayan Chakraborty ◽  
Rimilmandrita Ghosh ◽  
Divya Radhakrishnan ◽  
Saravanan Peruncheralathan ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Comparative Study ◽  
Contrast Agents ◽  
Diagnostic Tool ◽  
Molecular Hydrogen

The effectiveness of MRI as a diagnostic tool have increased tremendously after the discovery of contrast agents (CA). Most of the clinically approved CAs at present are relaxation based and...

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