π-Stacking interactions in new arylsulphonylamine-substituted derivatives of imidazo[2,1-b]thiazol

2022 ◽  
Vol 1248 ◽  
pp. 131423
Author(s):  
T.N. Borodina ◽  
V.I. Smirnov ◽  
V.Yu. Serykh ◽  
I.B. Rozentsveig
Keyword(s):  
Stacking Interactions ◽  
Π Stacking ◽  
Derivatives Of

Comparison of the structure of (E)-2-(2-benzylidenehydrazinylidene)quinoxaline with those of its chloro- and bromobenzylidene analogues

2013 ◽  
Vol 69 (8) ◽  
pp. 920-926
Author(s):  
Ligia Rebelo Gomes ◽  
John Nicolson Low ◽  
Ana S. M. C. Rodrigues ◽  
James L. Wardell ◽  
Marcus V. N. de Souza ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Supramolecular Structures ◽  
Stacking Interactions ◽  
Asymmetric Unit ◽  
Hydrogen Bond Interactions ◽  
Π Stacking ◽  
Derivatives Of

(E)-2-(2-Benzylidenehydrazinylidene)quinoxaline, C15H12N4, crystallized with two molecules in the asymmetric unit. The structures of six halogen derivatives of this compound were also investigated: (E)-2-[2-(2-chlorobenzylidene)hydrazinylidene]quinoxaline, C15H11ClN4; (E)-2-[2-(3-chlorobenzylidene)hydrazinylidene]quinoxaline, C15H11ClN4; (E)-2-[2-(4-chlorobenzylidene)hydrazinylidene]quinoxaline, C15H11ClN4; (E)-2-[2-(2-bromobenzylidene)hydrazinylidene]quinoxaline, C15H11BrN4; (E)-2-[2-(3-bromobenzylidene)hydrazinylidene]quinoxaline, C15H11BrN4; (E)-2-[2-(4-bromobenzylidene)hydrazinylidene]quinoxaline, C15H11BrN4. The 3-Cl and 3-Br compounds are isomorphous, as are the 4-Cl and 4-Br compounds. In all of these compounds, it was found that the supramolecular structures are governed by similar predominant patterns,viz.strong intermolecular N—H...N(pyrazine) hydrogen bonds supplemented by weak C—H...N(pyrazine) hydrogen-bond interactions in the 2- and 3-halo compounds and by C—H...Cl/Br interactions in the 4-halo compounds. In all compounds, there are π–π stacking interactions.

Syntheses, characterization, and X-ray crystal structures of diorganotin(IV) derivatives of 2-pyridinethiolato-N-oxide

2003 ◽  
Vol 81 (10) ◽  
pp. 1070-1075 ◽  
Author(s):  
Chunlin Ma ◽  
Junhong Zhang ◽  
Rufen Zhang
Keyword(s):  
Crystal Structure ◽  
Stacking Interactions ◽  
X Ray ◽  
X Ray Crystallography ◽  
Nmr Data ◽  
Π Stacking ◽  
Oxide Crystal ◽  
Distorted Trigonal Bipyramid ◽  
Π Stacking Interaction ◽  
Derivatives Of

The diorganotin(IV) dichloride reacts with sodium 2-pyridinethiolato-N-oxide in a 1:1 ratio to produce [Me2SnCl(2-SpyO)] (1), [Et2SnCl(2-SpyO)] (2), [Bu2SnCl(2-SpyO)] (3), [Ph2SnCl(2-SpyO)] (4), and [(PhCH2)2SnCl(2- SpyO)] (5). The new complexes have been characterized by elemental analysis and IR and NMR (1H, 119Sn, and 13C) spectroscopy. On the basis of 119Sn NMR data the effective coordination number in solution is five. The structures 1 and 4 have been confirmed by X-ray crystallography. Crystals of 1 are triclinic with space group P[Formula: see text] and those of 4 are monoclinic, P21/n. The tin environment is a distorted trigonal bipyramid with the Cl and oxygen atoms in apical positions. Both complexes exhibit strong π–π stacking interactions. Key words: diorganotin, π–π stacking interaction, 2-pyridinethiolato-N-oxide, crystal structure.

Neue Pentaphosphaferrocene

2009 ◽  
Vol 64 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Fabian Dielmann ◽  
Roger Merkle ◽  
Sebastian Heinl ◽  
Manfred Scheer
Keyword(s):  
Crystal Lattice ◽  
Stacking Interactions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cyclopentadienyl Ligand ◽  
Π Stacking ◽  
Diffraction Structure ◽  
Structure Determinations ◽  
Phenyl Rings ◽  
Derivatives Of

By cothermolysis of [CpRFe(CO)2]2 [CpR = η5-C5(CH2Ph)5 (Cpbn) (1) and η5-C5Me4C2H4SMe (CpS) (2)] with P4 phosphorus two novel pentaphosphaferrocenes of the formula [CpRFe(η5-P5)] [CpR = CpS (3), Cpbn (4)] have been synthesised and comprehensively characterised. These two products represent the first derivatives of this class of compounds with a functionalised as well as a sterically bulky adjacent cyclopentadienyl ligand. The pentabenzylcyclopentadienyl derivative 4 as well as both of the starting materials [CpRFe(CO)2]2 1 and 2 have been additionally characterised by X-ray diffraction structure determinations. The pentaphosphaferrocene 4 represents in the crystal lattice highly aggregated units via intra- and intermolecular π-stacking interactions of the phenyl rings of the Cpbn ligand.

Sulfonate pseudohalides of boron subphthalocyanine

2012 ◽  
Vol 68 (11) ◽  
pp. o459-o464 ◽  
Author(s):  
Andrew S. Paton ◽  
Alan J. Lough ◽  
Timothy P. Bender
Keyword(s):  
Crystal Structures ◽  
Concave Side ◽  
Sulfonate Group ◽  
Stacking Interactions ◽  
Space Group ◽  
Π Stacking ◽  
Boron Subphthalocyanine ◽  
Derivatives Of

The crystal structures of three sulfonate pseudohalide derivatives of boron subphthalocyanine (BsubPc) are described and compared with four structures of three published sulfonate derivatives. Benzenesulfonate boron subphthalocyanine [(benzenesulfonato)(subphthalocyaninato)boron, C30H17BN6O3S, (I)] crystallizes in the space groupP\overline{1} withZ= 2. The structure contains two centrosymmetric π-stacking interactions between the concave faces of the isoindoline units in the BsubPc ligands. 3-Nitrobenzenesulfonate boron subphthalocyanine [(3-nitrobenzenesulfonato)(subphthalocyaninato)boron, C30H16BN7O5S, (II)] crystallizes in the space groupP21/cwithZ= 4. The structure contains an intermolecular S—O...π interaction from the sulfonate group to a five-membered N-containing ring of an isoindoline unit on the concave side of a neighbouring BsubPc ligand, at a distance of 3.151 (3) Å. The crystal of methanesulfonate boron subphthalocyanine [(methanesulfonato)(subphthalocyaninato)boron, C25H15BN6O3S, (III)] was producedviasublimation and it is not a solvate, in contrast with two previously published structures of the same compound. Compound (III) crystallizes in the space groupP21/nwithZ = 2, and its structure is similar to that of the more common compound Cl-BsubPc.

REGULATION OF π··· π STACKING INTERACTIONS BETWEEN TRIIMIDAZOLE LUMINOPHORES AND COMPREHENSIVE EMISSION QUENCHING BY COORDINATION TO Cu(II)

2021 ◽  
Author(s):  
Elena Melnic ◽  
Victor Ch. Kravtsov ◽  
Elena Lucenti ◽  
Elena Cariati ◽  
Alessandra Forni ◽  
...  
Keyword(s):  
Coordination Compounds ◽  
Positional Isomer ◽  
Stacking Interactions ◽  
Pyridine Derivatives ◽  
Π Stacking ◽  
Emission Quenching ◽  
Derivatives Of

Eight Cu(II) coordination compounds with cyclic triimidazole, triimidazo[1,2-a:1’,2’-c:1”,2”-e][1,3,5]-triazine (L1), its positional isomer, triimidazo[1,2-a:1’,2’-c:1”,5”-e][1,3,5]-triazine (L2), and two pyridine derivatives of L1, 3-(pyridin-2-yl)triimidazo[1,2-a:1',2'-c:1'',2''-e][1,3,5]triazine (L3) and 3-(pyridin-4-yl)triimidazo[1,2-a:1',2'-c:1'',2''-e][1,3,5]triazine (L4) are reported. All compounds represent...

Self-Recognizing π-π Stacking Interactions Designed for the Generation of Ultrastable Mesoporous Hydrogen-Bonded Organic Frameworks

2019 ◽  
Author(s):  
KAIKAI MA ◽  
Peng Li ◽  
John Xin ◽  
Yongwei Chen ◽  
Zhijie Chen ◽  
...  
Keyword(s):  
Pore Size ◽  
Fiber Composite ◽  
Aqueous Media ◽  
Stacking Interactions ◽  
Mustard Gas ◽  
X Ray Diffraction ◽  
X Ray ◽  
Expansion Strategy ◽  
Π Stacking ◽  
Hydrogen Bonded

Creating crystalline porous materials with large pores is typically challenging due to undesired interpen-etration, staggered stacking, or weakened framework stability. Here, we report a pore size expansion strategy by self-recognizing π-π stacking interactions in a series of two-dimensional (2D) hydrogen–bonded organic frameworks (HOFs), HOF-10x (x=0,1,2), self-assembled from pyrene-based tectons with systematic elongation of π-conjugated molecular arms. This strategy successfully avoids interpene-tration or staggered stacking and expands the pore size of HOF materials to access mesoporous HOF-102, which features a surface area of ~ 2,500 m2/g and the largest pore volume (1.3 cm3/g) to date among all reported HOFs. More importantly, HOF-102 shows significantly enhanced thermal and chemical stability as evidenced by powder x-ray diffraction and N2 isotherms after treatments in chal-lenging conditions. Such stability enables the adsorption of dyes and cytochrome c from aqueous media by HOF-102 and affords a processible HOF-102/fiber composite for the efficient photochemical detox-ification of a mustard gas simulant.

Examination of Aggregation Induced Enhanced Emission in a Propeller Shaped Chiral- Nonconjugated Blue Emitter from Restricted Intramolecular Rotation and J Type π⋯π Stacking Interactions

2021 ◽  
Author(s):  
Gul Yakali
Keyword(s):  
Thin Film ◽  
Small Molecules ◽  
Solid Phase ◽  
Stacking Interactions ◽  
Optoelectronic Materials ◽  
Π Stacking ◽  
Intramolecular Rotation

Fluorescent organic small molecules with the property of aggregation induced enhanced emission in the solid phase (crystall or thin film) have great attention for the design of optoelectronic materials. Generally,...

X-ray Crystal Structure of Gallium Tris- (8-hydroxyquinoline):  Intermolecular π−π Stacking Interactions in the Solid State

1999 ◽  
Vol 11 (3) ◽  
pp. 530-532 ◽  
Author(s):  
Yue Wang ◽  
Weixing Zhang ◽  
Yanqin Li ◽  
Ling Ye ◽  
Guangdi Yang
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Stacking Interactions ◽  
X Ray ◽  
Π Stacking
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