C–H···O Hydrogen bonds in the mixed-valence salt [(η6-C6H6)2Cr]+[CrO3(OCH3)]- and the breakdown of the length/strength analogy

1998 ◽  
Vol 22 (8) ◽  
pp. 755-757 ◽  
Author(s):  
Dario Braga ◽  
Fabrizia Grepioni ◽  
Emilio Tagliavini ◽  
Juan J. Novoa ◽  
Fernando Mota
Keyword(s):  
Hydrogen Bonds ◽  
Mixed Valence

scholarly journals Crystal structure of a mixed-valence μ-oxide Sn12cluster

2014 ◽  
Vol 70 (11) ◽  
pp. m378-m379 ◽  
Author(s):  
Marina M. Kireenko ◽  
Kirill V. Zaitsev ◽  
Sergey S. Karlov ◽  
Mikhail P. Egorov ◽  
Andrei V. Churakov
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Complex Molecule ◽  
Mixed Valence ◽  
Asymmetric Unit ◽  
Coordination Numbers ◽  
Trigonal Bipyramidal ◽  
Distorted Trigonal Bipyramidal Coordination ◽  
Solvent Molecules ◽  
Distorted Trigonal Bipyramidal

The mixed-valence μ-oxide Sn12cluster, decacarbonyltetra-μ4-oxido-hexa-μ3-oxido-tetrakis[μ-2,2′-(pyridine-2,6-diyl)bis(1,1-diphenylethanolato)]decatin(II)ditin(IV)dimolybdenum(O)(2Mo—Sn) toluene heptasolvate, [Mo2Sn12(C33H27NO2)4O10(CO)10]·7C7H8, has a crystallographically imposed inversion centre. The asymmetric unit also contains three and a half toluene solvent molecules, one of which is disordered about a centre of symmetry. The complex molecule comprises six distinct Sn atom species with four different coordination numbers, namely 3, 4, 5, and 6. The SnIIatoms forming the central Sn10O10core adopt distorted trigonal–pyramidal, square-pyramidal and octahedral coordination geometries provided by the μ-oxide atoms and by the O- and N-donor atoms of two pyridinediethanolate ligands. The terminal SnIVatoms have distorted trigonal–bipyramidal coordination geometries, with a μ4-oxide atom and the N atom of a pyridinediethanolate ligand occupying the axial positions, and the Mo atom of a Mo(CO)5group and the alkoxy O atoms of a ligand forming the equatorial plane. In the crystal, weak intra- and intermolecular C—H...O hydrogen bonds are observed.

scholarly journals Divergent Reactivity of 2-Vinylpyridine and 1-Vinylpyrazole in Rhodium-Phosphine Systems: C-H Activation and Dinuclear Chemistry

2017 ◽  
Vol 61 (2) ◽  
Author(s):  
Ramón Azpíroz ◽  
Vincenzo Passarelli ◽  
Ricardo Castarlenas ◽  
Jesús J. Pérez-Torrente ◽  
Luis A. Oro
Keyword(s):  
Hydrogen Bonds ◽  
Olefinic Proton ◽  
Mixed Valence ◽  
Dinuclear Complex ◽  
Activation Process ◽  
Aromatic Rings ◽  
X Ray ◽  
Π Interactions ◽  
3D Packing

The Rh<sup>I</sup>-Rh<sup>III</sup> mixed valence dinuclear complex Rh<sub>2</sub>-Cl<sub>2</sub>(μ-H)(μ-η<sup>2</sup>,κ<sup>2</sup>-C,N-NC<sub>5</sub>H<sub>4</sub>-2-(Z)CH=CH)(PPhMe<sub>2</sub>)<sub>3</sub> has been prepared by reaction of [Rh(μ-Cl)(η<sup>2</sup>-coe)<sub>2</sub>]<sub>2</sub> with 2-vinylpyridine in the presence of dimethylphenylphosphine as a result of C-H activation of the terminal olefinic proton. The X-ray structure presents anagostic Rh···HC and π-π interactions between aromatic rings. In contrast, 1-vinylpyrazole does not undergo a C-H activation process, resulting in the formation of dinuclear species supported by 1-vinylpyrazole bridges. Anagostic Rh···HC interactions and CH···Cl hydrogen bonds are responsible for the 3D packing of the complex.

scholarly journals A one-dimensional iodido-bridged PtII/PtIV mixed-valence complex cation with a hydrogen sulfate counter-anion

2018 ◽  
Vol 74 (12) ◽  
pp. 1821-1825
Author(s):  
Nobuyuki Matsushita
Keyword(s):  
Hydrogen Bonds ◽  
Crystal Packing ◽  
Rotation Axis ◽  
Linear Chain ◽  
Mixed Valence ◽  
Structural Parameter ◽  
Water Molecules ◽  
Hydrogen Sulfate ◽  
Pt Complex ◽  
Amine Groups

The title compound, catena-poly[[[bis(ethylenediamine-κ2 N,N′)platinum(II)]-μ-iodido-[bis(ethylenediamine-κ2 N,N′)platinum(IV)]-μ-iodido] tetra(hydrogen sulfate) dihydrate], {[PtII(C2H8N2)2][PtIVI2(C2H8N2)2](HSO4)4·2H2O} n , has a linear chain structure comprising alternating platinum cations with mixed-valent oxidation states of +II/IV. Square-planar [Pt(en)2]2+ cations and elongated octahedral trans-[PtI2(en)2]2+ cations (en is ethylenediamine) are stacked alternately parallel to the b axis, and are bridged by the I ligands. The Pt site of the [PtII/IV(en)2] units is located on a twofold rotation axis. The I site, which is located on the same twofold rotation axis, is equally disordered over two positions. The Pt and I sites form a straight ...I—PtIV—I...PtII... chain, with PtIV—I bond lengths of 2.7202 (6) and 2.6917 (6) Å, and PtII...I contacts of 3.2249 (6) and 3.2534 (6) Å. The mixed-valence state of the Pt site is expressed by the structural parameter δ = (PtIV–I)/(PtII...I), with values of 0.843 and 0.827 for the two independent I atoms. In the crystal structure, the cationic columnar structure is stabilized by hydrogen bonds of the type N—H...O between the amine groups of the Pt complex chains and the disordered hydrogen sulfate counter anions, and between the amine groups and water molecules of crystallization. In addition, O—H...O hydrogen bonds between the hydrogen sulfate anions and water molecules of crystallization and between the hydrogen sulfate anions themselves consolidate the crystal packing.

scholarly journals Mixed valence trimers in cation radical salts of TMTTF with the planar bis(6-sulfo-8-quinolato) platinum complex [Pt(qS)2]2−

2020 ◽  
Vol 44 (36) ◽  
pp. 15538-15548
Author(s):  
Arkadiusz Frąckowiak ◽  
Bolesław Barszcz ◽  
Iwona Olejniczak ◽  
Mikołaj Tomasik ◽  
Natalia Jarzyniak ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Mixed Valence ◽  
Platinum Complex ◽  
Cation Radical

Hydrogen bonds between conducting stacks of (TMTTF)32+ trimers and the planar bis-sulfonate platinum complex [Pt(qS)2]2−.

scholarly journals Crystal structure of ammonium divanadium(IV,V) tellurium(IV) heptaoxide

2014 ◽  
Vol 70 (7) ◽  
pp. 27-30 ◽  
Author(s):  
William T. A. Harrison ◽  
Magnus G. Johnston
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Mixed Valence ◽  
Building Blocks ◽  
Double Layers ◽  
Lone Pairs ◽  
Vertex Sharing ◽  
Charge Balancing ◽  
Inorganic Network

The polyhedral building blocks of the layered inorganic network in the mixed-valence title compound, (NH4)(VIVO2)(VVO2)(TeO3), are vertex-sharing VVO4tetrahedra, distorted VIVO6octahedra and TeO3pyramids, which are linked by V—O—V and V—O—Te bonds, forming double layers lying parallel to (100). The presumed TeIVlone-pairs of electrons appear to be directed inwards into cavities in the double layers. The charge-balancing ammonium cations lie between the layers and probably interact with themviaN—H...O hydrogen bonds.

Heisenberg and double exchange in iron mixed valence [Fe6S6]+ supercluster

1997 ◽  
Vol 90 (3) ◽  
pp. 445-463 ◽  
Author(s):  
M. CZERWINSKI ◽  
J. DĄBROWSKI
Keyword(s):  
Mixed Valence ◽  
Double Exchange

Use of molecular overlap to predict intermolecular repulsion in N... H-O hydrogen bonds

1998 ◽  
Vol 95 (3) ◽  
pp. 525-537 ◽  
Author(s):  
I. NOBELI S. L. PRICE R. J. WHEATLEY
Keyword(s):  
Hydrogen Bonds
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