Synthesis, solid-state and solution structure, and physicochemical properties of the iodide-bridged face-sharing bioctahedral molybdenum(III) dimers [Cat]+[Mo2I7(PMe3)2]-(Cat = PHMe3, NMe4 AsPh4)

1987 ◽  
Vol 26 (20) ◽  
pp. 3310-3315 ◽  
Author(s):  
F. Albert Cotton ◽  
Rinaldo Poli
Keyword(s):  
Solid State ◽  
Physicochemical Properties ◽  
Solution Structure

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.

scholarly journals Polymorphism in Sulfadimidine/4-Aminosalicylic Acid Cocrystals: Solid-State Characterization and Physicochemical Properties

2015 ◽  
Vol 104 (4) ◽  
pp. 1385-1398 ◽  
Author(s):  
Christine Grossjohann ◽  
Dolores R. Serrano ◽  
Krzysztof J. Paluch ◽  
Peter O’Connell ◽  
Liana Vella-Zarb ◽  
...  
Keyword(s):  
Solid State ◽  
Physicochemical Properties ◽  
Aminosalicylic Acid ◽  
Solid State Characterization

Tosylate salts of the anticancer drug lapatinib

2013 ◽  
Vol 69 (12) ◽  
pp. 1516-1523 ◽  
Author(s):  
K. Ravikumar ◽  
B. Sridhar ◽  
Jagadeesh Babu Nanubolu ◽  
A. K. S. Bhujanga Rao ◽  
R. Jyothiprasad
Keyword(s):  
Solid State ◽  
Hydrogen Bonds ◽  
Physicochemical Properties ◽  
Anticancer Drug ◽  
Ring System ◽  
Nonbonded Interactions ◽  
One Dimensional ◽  
Drug Products ◽  
Ring Motif

Two tosylate salts of an anticancer drug lapatinib,viz. a monotosylate [systematic name: ({5-[4-({3-chloro-4-[(3-fluorophenyl)methoxy]phenyl}amino)quinazolin-6-yl]furan-2-yl}methyl)[2-(methylsulfonyl)ethyl]azanium 4-methylbenzenesulfonate], C29H27ClFN4O4S+·C7H7O3S−, (I), and a ditosylate [systematic name: 4-({3-chloro-4-[(3-fluorophenyl)methoxy]phenyl}amino)-6-]5-({[2-(methylsulfonyl)ethyl]azaniumyl}methyl)furan-2-yl[quinazolin-1-ium bis(4-methylbenzenesulfonate)], C29H28ClFN4O4S2+·2C7H7O3S−, (II), were obtained during crystallization attempts for polymorphism. In both structures, the lapatinib cation is in a distorted U-like conformation and the tosylate anion is clamped between the aniline N atom and methylamine N atom through N—H...O hydrogen bonds, forming anR22(15) ring motif. The 4-anilinoquinazoline ring system is essentially planar in (I), while it is twisted in (II), controlled by an intramolecular C—H...N interaction. In (I), alternating cations and anions are linked by N—H...O hydrogen bonds intoC22(6) chains. These chains are linked by cations in a helical manner. The presence of the additional tosylate anion in (II) results in the formation of one-dimensional tapes of fused hydrogen-bonded rings through N—H...O and C—H...O interactions. These studies augment our understanding of the role of nonbonded interactions in the solid state, which is useful for correlation to the physicochemical properties of drug products.

Organophosphorus-B(C6F5)3 adducts: towards new solid-state emitting materials

2019 ◽  
Vol 48 (34) ◽  
pp. 12803-12807 ◽  
Author(s):  
Elzbieta Regulska ◽  
Sonja Christ ◽  
Johannes Zimmermann ◽  
Frank Rominger ◽  
Gerardo Hernandez-Sosa ◽  
...  
Keyword(s):  
Solid State ◽  
Physicochemical Properties ◽  
Phosphorus Heterocycles

Tuning the physicochemical properties of six-membered phosphorus heterocycles through complexation with B(C6F5)3 towards improved solid-state emitting materials.

scholarly journals Ultralight-Weight Cellulose Aerogels from NBnMO-Stabilized Lyocell Dopes

2007 ◽  
Vol 2007 ◽  
pp. 1-4 ◽  
Author(s):  
Falk Liebner ◽  
Antje Potthast ◽  
Thomas Rosenau ◽  
Emmerich Haimer ◽  
Martin Wendland
Keyword(s):  
Carbon Dioxide ◽  
Solid State ◽  
Solution Structure ◽  
Supercritical Drying ◽  
Regenerated Cellulose ◽  
Cellulose Content ◽  
Solvent Exchange ◽  
New Materials ◽  
Specific Density ◽  
Regeneration Procedure

Cellulose aerogels are intriguing new materials produced by supercritical drying of regenerated cellulose obtained by solvent exchange of solid Lyocell moldings. FromN-methylmorpholine-N-oxide solutions with cellulose contents between 1 and 12%, dimensionally stable cellulose bodies are produced, in which the solution structure of the cellulose is largely preserved and transferred into the solid state. The specific density and surface of the obtained aerogels range from 0.05 to 0.26 g/cm3and from 172 to 284m2/g, respectively, depending on the cellulose content of the Lyocell dopes and regeneration procedure. A reliable extraction and drying procedure using supercritical carbon dioxide, the advantageous use of NBnMO as stabilizer for the Lyocell dopes, and selected physical properties of the materials is communicated.

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