Investigating the influence of the sulfur oxidation state on solid state conformation

CrystEngComm ◽  
2012 ◽  
Vol 14 (23) ◽  
pp. 7848
Author(s):  
Carla A. Daly ◽  
Kevin S. Eccles ◽  
Lorraine M. Bateman ◽  
Noel M. O' Boyle ◽  
Simon E. Lawrence ◽  
...  
Keyword(s):  
Solid State ◽  
Oxidation State ◽  
Sulfur Oxidation ◽  
Solid State Conformation

Three new staphylonuclear chloromolybdates : K6Mo3Cl12, (NH4)7Mo3Cl13,H2O, and Cs6Mo4Cl16

1965 ◽  
Vol 18 (3) ◽  
pp. 271 ◽  
Author(s):  
IR Anderson ◽  
JC Sheldon
Keyword(s):  
Solid State ◽  
Hydrochloric Acid ◽  
Absorption Spectra ◽  
Oxidation State ◽  
Chlorine Atom ◽  
Reducing Agents ◽  
Ammonium Salts ◽  
Chlorine Atoms ◽  
Regular Triangle ◽  
New Compounds

The new compounds, K6Mo3IICl12; (NH4)7Mo3IICl13.H2O; and Cs6Mo4Cl16 (containing molybdenum in oxidation state +2.5) have been precipitated by the appropriate cation from solutions of molybdenum(II) acetate in 12M hydrochloric acid. The absorption spectra of potassium and ammonium salts are similar in the solid state and solution. Since the compounds are strong reducing agents and short-lived in solution, their formulation as a staphylonuclear (i.e. metal-clustered) trimer or tetramer rests on their diamagnetism, stoicheiometry, and spectral similarities. It is proposed that the chloromolybdates adopt entirely novel, compact polymers by stacking the chlorine atoms into "close packed" layers. The Mo3Cl13 group consists of two layers of chlorine atoms (seven and six) generating three octahedral locations for the molybdenum atoms at the corners of a regular triangle. The Mo3Cl12 group is similar but deficient in one chlorine atom. The Mo4Cl16 group is related to Mo3Cl13 and consists of three layers of chlorine atoms (seven, six, and three) providing four octahedral locations for the molybdenum atoms at the corners of a tetrahedron.

scholarly journals Thermal and long period stability of series of V(V), V(IV) and V(III) complex with Schiff base ligands in solid state

2019 ◽  
Vol 4 (1) ◽  
pp. 30-36 ◽  
Author(s):  
Janusz Szklarzewicz ◽  
Anna Jurowska ◽  
Maciej Hodorowicz ◽  
Ryszard Gryboś
Keyword(s):  
Thermal Stability ◽  
Schiff Base ◽  
Solid State ◽  
Physicochemical Properties ◽  
General Formula ◽  
Oxidation State ◽  
Magnetic Moment ◽  
Tridentate Ligand ◽  
Schiff Base Ligands ◽  
Long Period

The synthesis and physicochemical properties of three new complexes of vanadium at +5, +4 and +3 oxidation state are described and discussed. The octahedral surrounding of vanadium for V(III) complexes of [V(L1)(HL1)] general formula is filled with two ONO tridentate ligand L, for V(IV) one ONO ligand L, oxido ligand and 1,10-phenanthroline (phen) as a co-ligand are presented in complexes of [VO(L2)(phen)]. For V(V) the complexes of [VO2(L1)(solv)] type were formed. As ligands, the H2L Schiff bases were formed in reaction between 5-hydroxysalcylaldehyde and phenylacetic hydrazide (H2L1) and 3,5-dichlorosalicyaldehyde and 4-hydroxybenzhydrazide (L2). The magnetic moment measurements, in 8 year period, show, that V(III) complexes slowly oxidise to V(IV) with preservation of the nonoxido character of the complexes, while V(IV) complexes were found to be stable. The TG and SDTA measurements indicate, that thermal stability depends mainly on the oxidation state of vanadium. The less thermally stable are the V(V) complexes, while V(IV) and V(III) are stable up to ca. 200oC. In solution, at pH 2 (similar to that in human digestion system), again the V(IV) are the most stable, only at pH 7.0 V(III) complexes had higher stability. The most stable, thus best for pharmaceutical use, are V(IV) complexes.

A solution and solid state conformation of 2-diphenylphosphinoyl-1,3-dioxanes. The nature of O-C-P anomeric interactions.

Tetrahedron ◽  
1992 ◽  
Vol 48 (20) ◽  
pp. 4209-4230 ◽  
Author(s):  
Marian Mikołajczyk ◽  
Piotr P. Graczyk ◽  
Michał W. Wiecorek ◽  
Grzegorz Bujacz
Keyword(s):  
Solid State ◽  
Solid State Conformation

Bicyclic peptides: Solid state conformation of cyclo(Glu-Leu-Pro-Gly-Lys-Leu-Pro-Gly)cyclo(1?-5?)Gly

Biopolymers ◽  
1990 ◽  
Vol 30 (5-6) ◽  
pp. 509-516 ◽  
Author(s):  
Benedetto Di Blasio ◽  
Ettore Benedetti ◽  
Vincenzo Pavone ◽  
Carlo Pedone ◽  
Michele Saviano ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Conformation

scholarly journals Solid State Structure of 2,2,4,4,6,6-Hexa(β-naphthyloxo)cyclophosphazatriene and Dipole Moments of Hexa(aryloxo)cyclophosphazatrienes

1989 ◽  
Vol 44 (5) ◽  
pp. 575-581 ◽  
Author(s):  
Giuliano Bandoli ◽  
Umberto Casellato ◽  
Mario Gleria ◽  
Antonio Grassi ◽  
Enzo Montoneri ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Solid State ◽  
Crystal And Molecular Structure ◽  
Dipole Moments ◽  
X Ray ◽  
Substituent Group ◽  
Cell Dimensions ◽  
Unit Cell Dimensions ◽  
Solid State Conformation ◽  
Do So

The crystal and molecular structure of [NP(OC10H7)2]3 was determined by X-ray analysis.The dipole moments of this compound and of the hexa(phenoxo)cyclotriphosphazatrienes of formula [NP(OC6H3XX′Y)2]3 (X = X′ = H, Y = p-Br; X = m-CH3,. X′ = H. Y = p-Cl; X = X′ = m-CH3, Y = p-Cl; X = X′ = m-CH3, Y = H; X = X′ = H, Y = p-CH(CH3)2; X = X′ = H, Y = p-C(CH3)3) were measured in benzene at 25°C. Crystals of [NP(OC10H7)2]3 are monoclinic with unit cell dimensions a = 24.870(15), b = 7.712(8), c = 27.687(14) Å, β = 115.85(7)°; space group P21/c. The structure was refined to an agreement factor of 0.09. The phosphazene ring deviates (max. deviation 17°) from planarity. and mean distances (A) and angles (°) are P-N 1.58(1). P-O 1.58(1), O-C 1.41(2); P-N-P 120(1), N-P-N 119(1), P-O-C 124(2). The conformations of the naphthyloxo groups at P(2) and P(3) are similar, and different from the group at P(1).Dipole moment analysis showed that the solid state conformation changes in the solution state. The measured value was in agreement with a symmetric conformation in which at the O-P-O plane each naphthyloxo group is rotated by ca. 40-50° from the anti-coplanar arrangement relative to this plane. The dipole moment data for the p-substituted phenoxo derivatives agree with such a conformation, but the analysis of the dipole moment values of phosphazenes having phenoxo groups bearing more than one substituent group and p-CH(CH3)2 substituent failed to do so due to the inherent limitations of the method.

Bayesian methods for the conformational classification of eight-membered rings

2005 ◽  
Vol 61 (5) ◽  
pp. 585-594 ◽  
Author(s):  
J. Pérez ◽  
K. Nolsøe ◽  
M. Kessler ◽  
L. García ◽  
E. Pérez ◽  
...  
Keyword(s):  
Solid State ◽  
Bayesian Methods ◽  
Canonical Forms ◽  
Previous Knowledge ◽  
Data Set ◽  
Torsion Angles ◽  
Structural Database ◽  
Using Data ◽  
Solid State Conformation

Two methods for the classification of eight-membered rings based on a Bayesian analysis are presented. The two methods share the same probabilistic model for the measurement of torsion angles, but while the first method uses the canonical forms of cyclooctane and, given an empirical sequence of eight torsion angles, yields the probability that the associated structure corresponds to each of the ten canonical conformations, the second method does not assume previous knowledge of existing conformations and yields a clustering classification of a data set, allowing new conformations to be detected. Both methods have been tested using the conformational classification of Csp 3 eight-membered rings described in the literature. The methods have also been employed to classify the solid-state conformation in Csp 3 eight-membered rings using data retrieved from an updated version of the Cambridge Structural Database (CSD).

Solid-state conformation of the 1,3,2-oxazaphospholane ring in 2-dialkylamino-3,4-dimethyl-5-phenyl-1,3,2-oxazaphospholane sulfides

2001 ◽  
Vol 12 (3) ◽  
pp. 146-150 ◽  
Author(s):  
Rafal Kruszynski ◽  
Tadeusz J. Bartczak ◽  
Piotr Majewski
Keyword(s):  
Solid State ◽  
Solid State Conformation
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