Geometries of stacking interactions between phenanthroline ligands in crystal structures of square-planar metal complexes

2010 ◽  
Vol 17 (8) ◽  
pp. 2083-2092 ◽  
Author(s):  
Goran V. Janjić ◽  
Predrag V. Petrović ◽  
Dragan B. Ninković ◽  
Snežana D. Zarić
Keyword(s):  
Metal Complexes ◽  
Crystal Structures ◽  
Stacking Interactions ◽  
Square Planar ◽  
Phenanthroline Ligands

scholarly journals Stacking interactions between phenanthroline ligands in square-planar complexes

2011 ◽  
Vol 67 (a1) ◽  
pp. C321-C321
Author(s):  
D. B. Ninković ◽  
G. V. Janjić ◽  
P. V. Petrović ◽  
S. D. Zarić
Keyword(s):  
Stacking Interactions ◽  
Square Planar ◽  
Square Planar Complexes ◽  
Phenanthroline Ligands

Stacking interactions of the methylated cyclopentadienyl ligands in the crystal structures of transition metal complexes

2020 ◽  
Vol 76 (2) ◽  
pp. 252-258 ◽  
Author(s):  
Dušan P. Malenov ◽  
Jelena P. Blagojević Filipović ◽  
Snežana D. Zarić
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Crystal Structures ◽  
Transition Metal Complexes ◽  
Electrostatic Potential ◽  
Stacking Interactions ◽  
Cyclopentadienyl Ligands ◽  
Π Interactions ◽  
Structural Database ◽  
Oppositely Charged

In the crystal structures of methylated cyclopentadienyl (Cp) complexes (MeCp, Me4Cp and Me5Cp) deposited in the Cambridge Structural Database, certain orientation types of stacked contacts can be noted as the most frequent. These orientation preferences can be well explained by the matching of oppositely charged regions of electrostatic potential. Parallel displaced stacking, large offset stacking and C—H...π interactions are the dominant interaction types that are responsible for the arrangement in the crystal structures of stacked methylated Cp complexes.

Stacking vs. CH–π interactions between chelate and aryl rings in crystal structures of square-planar transition metal complexes

CrystEngComm ◽  
2007 ◽  
Vol 9 (9) ◽  
pp. 793 ◽  
Author(s):  
Dušan Sredojević ◽  
Goran A. Bogdanović ◽  
Zoran D. Tomić ◽  
Snežana D. Zarić
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Crystal Structures ◽  
Transition Metal Complexes ◽  
Π Interactions ◽  
Square Planar ◽  
Planar Transition

scholarly journals Transition metal complexes with thiosemicarbazide-based ligands. Part 51. Square-planer nickel(II)complex with acetylacetone bis(S-n-propylisothiosemicarbazone)(L).Crystal and molecular structure of [

2006 ◽  
Vol 71 (6) ◽  
pp. 593-604 ◽  
Author(s):  
Vukadin Leovac ◽  
Vladimir Divjakovic ◽  
Valerija Cesljevic ◽  
Milena Rakocevic
Keyword(s):  
Molecular Structure ◽  
Structural Analysis ◽  
Transition Metal ◽  
Metal Complexes ◽  
Crystal Structures ◽  
Transition Metal Complexes ◽  
Crystal And Molecular Structure ◽  
Square Planar ◽  
Significant Difference ◽  
Template Reaction

The template reaction of a warm methanolic solution of Ni(OAc)2?4H2O S-n-propylisothiosemicarbazide hydroiodide and acetylacetone yielded the needle- like, brown, diamagnetic complex [Ni(L-H)]I?MeOH, and in the presence of an excess of NH 4NCS, brown, prismatic crystals of the complex [Ni(L-H)]NCS (1), both compounds involving the monoanionic form of the ligand, acetylacetone bis(S-n-propylisothiosemicarbazone), L. Slow recrystallization fromMeOH, EtOH, iPrOH and Me2CO gave the corresponding monosolvent complexes [Ni(L-H)]I?solvent, of which only those involving EtOH and iPrOH were suitable for structural analysis. The crystallographic parameters of [Ni(L-H)]I?EtOH (2) and [Ni(L-H)]I?iPrOH (3) are very similar to each other, showing their structures are isomorphic. The crystal structures of the title compounds consist of the independent ions: NCS-, or I-, and the chemically identical cation [Ni(L-H)]+, where L-H is the monoanion resulting from deprotonation of the acetylacetone moiety, a tetradentate N4 ligand forming a square-planar coordination around a Ni(II) ion. It was found that the isothiosemicarbazide fragment of the ligand has an imido form. The complex cations of the compounds [Ni(L-H)]NCS and [Ni(L-H)]I?EtOH exhibit significant difference only in the conformation of their propyl groups.

Strong stacking interactions at large horizontal displacements of tropylium and cyclooctatetraenide ligands of transition metal complexes: crystallographic and DFT study

CrystEngComm ◽  
2020 ◽  
Vol 22 (22) ◽  
pp. 3831-3839 ◽  
Author(s):  
Dušan P. Malenov ◽  
Snežana D. Zarić
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Crystal Structures ◽  
Transition Metal Complexes ◽  
Dft Study ◽  
Stacking Interactions ◽  
Horizontal Displacements

Large offset stacking of tropylium and COT ligands, which is dominant in crystal structures, surpasses an energy of −3.0 kcal mol−1.

Parallel stacking interactions in square-planar transition-metal complexes containing fused chelate and C6-aromatic rings

2012 ◽  
Vol 68 (3) ◽  
pp. 261-265 ◽  
Author(s):  
Dušan N. Sredojević ◽  
Dubravka Z. Vojislavljević ◽  
Zoran D. Tomić ◽  
Snežana D. Zarić
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Large Fraction ◽  
Stacking Interactions ◽  
Aromatic Rings ◽  
Metal Type ◽  
Square Planar ◽  
Planar Transition ◽  
Chelate Rings

Stacking interactions in the crystal structures of square-planar transition metal complexes from the Cambridge Structural Database with five- and six-membered chelate rings fused with C6-arom rings (arom = aromatic) were analyzed. The distribution of distances between the closest C6-arom–C6-arom and C6-arom–chelate contacts shows that in a large fraction of the intermolecular interactions the C6-arom ring of one molecule is closer to the chelate than to the C6-arom ring of the other molecule. These results indicate a possible preference of the C6-arom ring to form stacking contacts with the chelate rings. The preference is ubiquitous and does not depend on the metal type.

scholarly journals Crystal structures of dichloridopalladium(II), -platinum(II) and -rhodium(III) complexes containing 8-(diphenylphosphanyl)quinoline

2015 ◽  
Vol 71 (5) ◽  
pp. 447-451 ◽  
Author(s):  
Takayoshi Suzuki ◽  
Hiroshi Yamaguchi ◽  
Masayuki Fujiki ◽  
Akira Hashimoto ◽  
Hideo D. Takagi
Keyword(s):  
Crystal Structures ◽  
Chelate Ring ◽  
Bidentate Ligand ◽  
Stacking Interactions ◽  
Complex Molecules ◽  
Π Stacking ◽  
Square Planar ◽  
Phenyl Rings ◽  
Π Stacking Interaction ◽  
Solvent Molecules

The crystal structures of dichloridopalladium(II), -platinum(II) and -rhodium(III) complexes containing 8-(diphenylphosphanyl)quinoline, (SP-4)-[PdCl2(C21H16NP)], (1) [systematic name: dichlorido(8-diphenylphosphanylquinoline)palladium(II)], (SP-4)-[PtCl2(C21H16NP)]·CH2Cl2, (2) [systematic name: dichlorido(8-diphenylphosphanylquinoline)platinum(II) dichloromethane monosolvate], and (OC-6–32)-[RhCl2(C21H16NP)2]PF6·0.5CH2Cl2·0.5CH3OH, (3) [systematic name:cis-dichloridobis(8-diphenylphosphanylquinoline)rhodium(III) hexafluoridophosphate dichloromethane/methanol hemisolvate] are reported. In these complexes, the phosphanylquinoline acts as a bidentate ligand, forming a planar asymmetrical five-membered chelate ring. The palladium(II) and platinum(II) complex molecules in (1) and (2), respectively, show a typical square-planar coordination geometry and form a dimeric structure through an intermolecular π–π stacking interaction between the quinolyl rings. The centroid–centroid distances between the stacked six-membered rings in (1) and (2) are 3.633 (2) and 3.644 (2) Å, respectively. The cationic rhodium(III) complex in (3) has acis(Cl),cis(P),cis(N)(OC-6–32) configuration of the ligands, in which two kinds of intramolecular π–π stacking interactions are observed: between the quinolyl and phenyl rings and between two phenyl rings, the centroid–centroid distances being 3.458 (2) and 3.717 (2) Å, respectively. The PF6−anion in (3) is rotationally disordered, the site occupancies of each F atom being 0.613 (14) and 0.387 (14). The CH2Cl2and CH3OH solvent molecules are also disordered and equal site occupancies of 0.5 are assumed.

Evidence of Chelate−Chelate Stacking Interactions in Crystal Structures of Transition-Metal Complexes

2010 ◽  
Vol 10 (9) ◽  
pp. 3901-3908 ◽  
Author(s):  
Dušan N. Sredojević ◽  
Zoran D. Tomić ◽  
Snežana D. Zarić
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Crystal Structures ◽  
Transition Metal Complexes ◽  
Stacking Interactions
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