A Novel Indole-Containing Diarylethene: Synthesis, Crystal Structure and Photochromism

2017 ◽  
Vol 41 (7) ◽  
pp. 423-426 ◽  
Author(s):  
Chunhong Zheng ◽  
Guanming Liao ◽  
Congbin Fan ◽  
Renjie Wang ◽  
Shouzhi Pu
Keyword(s):  
Crystal Structure ◽  
Quantum Yield ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Phenyl Group ◽  
X Ray Diffraction ◽  
X Ray ◽  
Meta Position ◽  
Thiophene Moiety ◽  
Photochemical Properties

An indole-containing diarylethene with a trifluoromethyl function at the meta-position of the phenyl group attached to the thiophene moiety was synthesised. Its structure was determined by single-crystal X-ray diffraction analysis and its photochemical properties in solution and in the single crystalline phases were studied. The compound showed relatively high fluorescent modulation efficiency and cyclisation quantum yield.

scholarly journals Darstellung von μ-Nitroso-bis(pentahydro-closo-hexaborat)(3-) und Kristallstruktur von Cs3[B6H5(NO)B6H5] / Preparation of μ-nitroso-bis(pentahydro-closo-hexaborate)(3-) and crystal structure of Cs3[B6H5(NO)B6H5]

1994 ◽  
Vol 49 (9) ◽  
pp. 1263-1266 ◽  
Author(s):  
A. Franken ◽  
W. Preetz
Keyword(s):  
Crystal Structure ◽  
Ion Exchange ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
X Ray ◽  
Diethylaminoethyl Cellulose

By electrochemical oxidation of [B6H6]2- in the presence of nitrite ions and of the base DBU in dichlorom ethane solution the μ-nitroso-bis(pentahydrohexaborate) [B6H5(NO)B6H5]3- ion is formed and can be isolated by ion exchange chromatography on diethylaminoethyl cellulose. The crystal structure of the Cs salt has been determined from single crystal X-ray diffraction analysis. Cs3[B6H5(NO)B6H5] is orthorhombic, space group Pnma with a = 16.2303(13), b = 12.245(6), c = 25.444(2) Å. The unit cell contains three crystallographically independent anions with nearly C2v symmetry but differently distorted B6 cages

Schwingungsspektrum und Kristallstruktur des fünffach-koordinierten cis-Dioxo-dipicolinato-vanadat(V)-Anions / Vibrational Spectrum and Crystal Structure of the cis-Dioxo-dipicolinato-vanadium(V) Anion

1978 ◽  
Vol 33 (3) ◽  
pp. 265-267 ◽  
Author(s):  
Bernhard Nuber ◽  
Johannes Weiss ◽  
Karl Wieghardt
Keyword(s):  
Crystal Structure ◽  
Raman Spectrum ◽  
Vibrational Spectrum ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
X Ray ◽  
Distorted Trigonal Bipyramid ◽  
Ir And Raman

Abstract cis-Dioxo-dipicolinato-vanadate(V), Crystal Structure, IR, Raman The crystal structure of Cs[V(O)2(dipic)]·H2O (dipic = pyridine-2,6-dicarboxylate) has been determined by single crystal x-ray diffraction analysis. The compound crystallizes in the monoclinic space group P21/a, with cell constants a =737.8(3), 6=1917.5(5), c = 792.9(3) pm, β= 94.87(6)°, and Z = 4. The geometry about vanadium is a distorted trigonal bipyramid containing a cis-dioxo moiety (∢ O-V-O 109.9(3)°, V=O bond lengths 161.0(6) and 161.5(6) pm). Vibrational absorptions νs(V - 0) and νas(V=O) were found at 956 and 947 cm-1 in the IR and Raman spectrum, resp.

scholarly journals Synthesis, Crystal Structure, and Luminescence of Cadmium(II) and Silver(I) Coordination Polymers Based on 1,3-Bis(1,2,4-triazol-1-yl)adamantane

Molecules ◽  
2021 ◽  
Vol 26 (17) ◽  
pp. 5400
Author(s):  
Roman D. Marchenko ◽  
Taisiya S. Sukhikh ◽  
Alexey A. Ryadun ◽  
Andrei S. Potapov
Keyword(s):  
Crystal Structure ◽  
Coordination Polymer ◽  
Metal Ions ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Coordination Polymers ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
One Dimensional ◽  
X Ray

Coordination polymers with a new rigid ligand 1,3-bis(1,2,4-triazol-1-yl)adamantane (L) were prepared by its reaction with cadmium(II) or silver(I) nitrates. Crystal structure of the coordination polymers was determined using single-crystal X-ray diffraction analysis. Silver formed two-dimensional coordination polymer [Ag(L)NO3]n, in which metal ions are linked by 1,3-bis(1,2,4-triazol-1-yl)adamantane ligands, coordinated by nitrogen atoms at positions 2 and 4 of 1,2,4-triazole rings. Layers of the coordination polymer consist of rare 18- and 30-membered {Ag2L2} and {Ag4L4} metallocycles. Cadmium(II) nitrate formed two kinds of one-dimensional coordination polymers depending on the metal-to-ligand ratio used in the synthesis. Coordination polymer [Cd(L)2(NO3)2]n was obtained in case of a 1:2 M:L ratio, while for M:L = 2:1 product {[Cd(L)(NO3)2(CH3OH)]·0.5CH3OH}n was isolated. All coordination polymers demonstrated ligand-centered emission near 450 nm upon excitation at 370 nm.

Darstellung und 11B-NMR-Spektrum von Heptabromo-closo-heptaborat, [B7Br7]2- sowie Kristallstruktur von [(C5H5N)2CH2][B7Br7] / Preparation and 11B NMR Spectrum of Heptabromo-closo-heptaborate, [B7Br7]2-, and the Crystal Structure of [(C5H5N)2CH2][B7Br7]

1996 ◽  
Vol 51 (5) ◽  
pp. 744-746 ◽  
Author(s):  
A. Franken ◽  
H. Thomsen ◽  
W. P reetz
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Alkaline Solution ◽  
Intensity Ratio ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Nmr Spectrum ◽  
X Ray ◽  
11B Nmr

By reaction of conjuncto-[B6H6-B6H6]2- in alkaline solution with excess bromine the heptabromo-closo-heptaborate, [B7Br7]2 is formed. The crystal structure of [(CsH3N)2CH2][B7Br7] has been determined by single crystal X-ray diffraction analysis (monoclinic, space group P21/a with a = 15.0843(14), b = 9.8882(14), c = 17.057(2) Å, β = 114.039°(7)). In accordance with the D5h point symmetry, the anion shows two singlets at -23.3 and -0.1 ppm with the intensity ratio 2:5 in its 11B NMR spectrum.

Synthese und Struktur von α,β-ungesättigten aliphatischen Diazenen / Preparation and Structures of α,β-Unsaturated Aliphatic Diazenes

1989 ◽  
Vol 44 (5) ◽  
pp. 543-547 ◽  
Author(s):  
Herbert W. Roesky ◽  
Uwe Otten ◽  
Regine Herbst ◽  
Mathias Noltemeyer
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Hydrogen Chloride ◽  
Phenyl Group ◽  
X Ray Diffraction ◽  
X Ray

The reactions of 1,1,2,2-tetrafluoroethane-1,2-bisulfenyl-chloride 1 and symmetrical azines 2 yield the conjugated trans-diazenes 3 as deep-coloured solids. Unsymmetrical azines 4 react with 1 under elimination of hydrogen chloride to give 1,3-dithiolane-substituted azine derivatives as pale-coloured liquids. The crystal structure of 3b has been determined by single crystal X-ray diffraction. A participation of the phenyl group in the conjugated system is not observed in 3b.

meso–meso Directly-linked trimeric and pentameric electron-deficient porphyrin–hexaphyrin hybrid arrays

2016 ◽  
Vol 20 (01n04) ◽  
pp. 245-253 ◽  
Author(s):  
Hirotaka Mori ◽  
Atsuhiro Osuka
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Solid State Structures

meso–meso Directly-linked trimeric and pentameric porphyrin–hexaphyrin hybrid arrays 5 and 6 comprising of electron-deficient porphyrin units were prepared by cross-condensation of monomeric and dimeric electron-deficient meso-formyl porphyrins with a tripyrrane. The solid-state structures of 5 and 6 have been determined by single crystal X-ray diffraction analysis. The latter is the largest crystal structure of meso–meso linked multiporphyrinic array analogues reported to date.

Die Kristallstruktur des Tetraphenylphosphonium-Monoiodohexahydroc/ oso-Hexaborats [P(C6H5)4][B6H6I] / The Crystal Structure of Tetraphenylphosphonium Monoiodohexahydro-closo-hexaborate [P(C6H5)4][B6H6I]

1994 ◽  
Vol 49 (12) ◽  
pp. 1809-1812 ◽  
Author(s):  
W. Preetz ◽  
D. Sonnak
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
X Ray Diffraction ◽  
Triclinic Space Group ◽  
Space Group ◽  
X Ray

The crystal structure of [P(C6H5)4][B6H6I] has been determined by single crystal X-ray diffraction analysis; triclinic, space group P1 with a = 7.5137(9), b = 12.623(2), c = 13.6363(13) Å, α = 87.787(13)°, β = 83.836(13)°, γ = 88.156(10)°. The additional H atom could be refined with B-H distances of 1.13 to 1.31 A above one of the facettes of the B6 octahedron opposite to the I substituent.

Synthesis and Structure of Permethylcyclopentadienyltitanium Diisopropoxide Zwitterionic Complex

2008 ◽  
Vol 73 (8-9) ◽  
pp. 1161-1176 ◽  
Author(s):  
Vojtech Varga ◽  
Jiří Pinkas ◽  
Ivana Císařová ◽  
Róbert Gyepes ◽  
Karel Mach ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Agostic Interaction ◽  
Nmr Data ◽  
Structure Geometry ◽  
Zwitterionic Complex ◽  
Half Sandwich

Half-sandwich pentamethylcyclopentadienyltitanium chloroisopropoxides [Ti(η5-C5Me5)-Ti(Oi-Pr)nCl3-n] (n = 1 (1) or 2 (2)) and methylisopropoxides [Ti(η5-C5Me5)Ti(Oi-Pr)nMe3-n] (n = 1 (3) or 2 (4)) were prepared and characterized by spectroscopic methods, and compound 1 by single crystal X-ray diffraction analysis. Compounds 3 and 4 were reacted with an equimolar quantity of B(C6F5)3, however, only compound 4 afforded a crystalline product of limited stability at ambient temperature. Its single crystal X-ray diffraction analysis revealed that it is the zwitterionic complex [(η5-C5Me5)Ti(Oi-Pr)2]+[(μ-Me)B(C6F5)3]- (5) and its crystal structure is very similar to the recently reported tert-butoxy complex [(η5-C5Me5)-Ti(Ot-Bu)2]+[(μ-Me)B(C6F5)3]- (6). The 1H, 13C, and 19F NMR spectra in C6D6 solution also showed the features analogous to those of 6. 1D NOESY experiments proved a close through space interaction of irradiated C5Me5 or OCHMe2 protons with the bridging Ti···Me-B group. The NMR data indicate the inner sphere ion pair structure of 5 in C6D6, like for 6. The crystal structure geometry of the C-H bonds of the Ti···Me-B group fulfils conditions for their agostic interaction with the titanium centre. Although structurally similar to 6, compound 5 is less thermally stable apparently due to a lower bulkiness of Oi-Pr group compared to that of Ot-Bu group.

Formation and Crystal Structures of 9-Methylanthracene Photodimer and Lepidopterene

2003 ◽  
Vol 2003 (7) ◽  
pp. 445-447
Author(s):  
Qing-Xiang Liu ◽  
Hai-Bin Song ◽  
Feng-Bo Xu ◽  
Qing-Shan Li ◽  
Xian-Shun Zeng ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Crystal Structures ◽  
Single Crystal Structure ◽  
X Ray Diffraction ◽  
X Ray

The 9-methylanthracene photodimer (6) and lepidopterene (7) were prepared by a photo-dimerisation reaction of 1-(9-anthracenylmethyl)-3-ethylimidazolium iodide (1) or α, α'-di[1-(9-anthracenylmethyl) imidazolium]- p-xylene dibromide (2). Compound 6 is derived from the head-tail [4+4] cycloaddition of two molecular 9-methylanthracenes, and the butterfly-shaped compound 7 is formed via the 9-methyleneanthracene radical in a two steps precess. The single crystal structure of 6 was determined by X-ray diffraction analysis. The changes of luminescent intensities of compounds 1, 2 and 7 are reported.

Schwingungsspektren und Normalkoordinatenanalysen der Dioxoosmate( VI) trans-[OsO2(CN)4]2-, trans-[OsO2(CN)2(0H )]22- und trans-[OsO2(CN)2(OCH3)]22 sowie Kristallstruktur von trans-(Ph3PNPPh3)2[OsO2(CN)2(OCH3)]2 / Vibrational Spectra and Normal Coordinate Analysis of the Dioxoosmates(VI) trans-[OsO2(CN)4]2-, trans-[OsO2 (CN)2(OH)]22- and trans-[OsO2(CN)2(OCH3]22- , and Crystal Structure of trans-(Ph3PNPPh3)2[OsO2(CN)2(OCH3)]2

1999 ◽  
Vol 54 (9) ◽  
pp. 1109-1115
Author(s):  
A. Strueß ◽  
W. Preetz
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Vibrational Spectra ◽  
Room Temperature ◽  
X Ray Diffraction ◽  
Normal Coordinate ◽  
Triclinic Space Group ◽  
X Ray ◽  
Ir And Raman

The crystal structure of trans-(Ph3PNPPh3)2[OsO2(CN)2(OCH3)]2 (triclinic, space group P1̄, a = 11.816(2), b = 13.480(3), c = 13.610(5) Å, α = 83.46(2), ß = 77.09(2), γ = 71.06(2)°, Z = 1) has been determined by single crystal X-ray diffraction analysis. The IR and Raman spectra of the (n-Bu4N)-salts of trans-[OsO2(CN)4]2- (1), trans-[OsO2(CN)2(OH)]22- (2) and trans-[OsO2(CN)2(OCH3)]22- (3) were measured at room temperature. Based on the molecular parameters of the X-ray determination normal coordinate analyses have been performed and the vibrations are assigned. The valence force constants of 1 are fd(Os=O) = 6.5, fd(Os-C) = 2.62 and fd(C≡N ) = 16.85 mdyn/A, of 2 and 3 are fd(Os=O) = 6.7, fd(Os-C) = 2.55 and fd(C≡N ) = 16.95 mdyn/Å. fd(Os-O) ranges from 2.0 - 2.2 and for the methoxy bridge is fd(C-O) = 4.00 mdyn/Å

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