Molecular structures of organotin tropolonato complexes with tin coordination numbers 5-7, seen by single-crystal x-ray diffraction and solid- and solution-state119Sn NMR

2001 ◽  
Vol 40 (1) ◽  
pp. 31-40 ◽  
Author(s):  
Carlos Camacho-Camacho ◽  
Rosalinda Contreras ◽  
Heinrich Nöth ◽  
Matthias Bechmann ◽  
Angelika Sebald ◽  
...  
Keyword(s):  
Single Crystal ◽  
Molecular Structures ◽  
X Ray Diffraction ◽  
X Ray ◽  
Coordination Numbers ◽  
Tin Coordination

Lewis-Base Adducts of Group 1B Metal(I) Compounds. XXI The Crystal and Molecular Structures of the Unsolvated Forms of Dibromotris(triphenylphosphine)dicopper(I) and 'step' Tetrabromotetrakis(triphenyl-phosphine)tetracopper(I)

1985 ◽  
Vol 38 (8) ◽  
pp. 1243 ◽  
Author(s):  
JC Dyason ◽  
LM Engelhardt ◽  
C Pakawatchai ◽  
PC Healy ◽  
AH White
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
Molecular Structures ◽  
Lewis Base ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
Triphenyl Phosphine ◽  
X Ray ◽  
Crystal And Molecular Structures

The crystal structures of the title compounds have been determined by single-crystal X-ray diffraction methods at 295 K. Crystal data for (PPh3)2CuBr2Cu(PPh3) (1) show that the crystals are iso-morphous with the previously studied chloro analogue, being monoclinic, P21/c, a 19.390(8), b 9.912(5), c 26.979(9) Ǻ, β 112,33(3)°; R 0.043 for No 3444. Cu( trigonal )- P;Br respectively are 2.191(3); 2.409(2), 2.364(2) Ǻ. Cu(tetrahedral)- P;Br respectively are 2.241(3), 2.249(3); 2.550(2), 2.571(2) Ǻ. Crystals of 'step' [PPh3CuBr]4 (2) are isomorphous with the solvated bromo and unsolvated iodo analogues, being monoclinic, C2/c, a 25.687(10), b 16.084(7), c 17.815(9) Ǻ, β 110.92(3)°; R 0.072 for No 3055. Cu( trigonal )- P;Br respectively are 2.206(5); 2.371(3), 2.427(2) Ǻ. Cu(tetrahedral)- P;Br are 2.207(4); 2.446(2), 2.676(3), 2.515(3) Ǻ.

scholarly journals Structural Study of Three 1,2,4-triazole Derivatives Prepared by Oxidative Cyclization of Thiosemicarbazides

Proceedings ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 20
Author(s):  
Mirian Artime ◽  
Alfonso Castiñeiras ◽  
Isabel García-Santos ◽  
Manuel Saa
Keyword(s):  
Acetic Acid ◽  
Single Crystal ◽  
Structural Study ◽  
Supramolecular Assembly ◽  
Oxidative Cyclization ◽  
Molecular Structures ◽  
X Ray Diffraction ◽  
X Ray ◽  
Triazole Derivatives

In the present research, 5,5-dimethyl-4-phenyl-4,5-dihydro-3H-1,2,4-triazole-3-thione (1) was prepared by condensation from N-phenylhydrazinecarbothioamide, while 4-phenyl-5-(pyrazin-2-yl)-2,4-dihydro-3H-1,2,4-triazole-3-thione (2) and 2-((5-(pyridin-2-yl) -4H-1,2,4-triazol-3-yl)thio)acetic acid (3) was prepared by oxidative cyclization from 2-(amino(pyrazin-2-yl)methylene)-N-phenylhydrazine-1-carbothioamide and 2-(amino(pyridine-2-yl)methylene)hydrazine-1-carbothioamide, respectively. The three compounds have been well characterized and their molecular structures studied by single-crystal X-ray diffraction. The supramolecular assembly of each crystal has also been analyzed and discussed.

A Three-Dimensional Silver(I) Framework Assembled from Nitrilotriacetate

2005 ◽  
Vol 58 (2) ◽  
pp. 115 ◽  
Author(s):  
Chun-Long Chen ◽  
Qian Zhang ◽  
Ji-Jun Jiang ◽  
Qin Wang ◽  
Cheng-Yong Su
Keyword(s):  
Crystal Structure ◽  
Ir Spectroscopy ◽  
Coordination Polymer ◽  
Single Crystal ◽  
Elemental Analysis ◽  
Three Dimensional ◽  
Single Crystal Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Coordination Numbers

The reaction of AgCF3CO2 with nitrilotriacetate (NTA) yields the three-dimensional silver(i) coordination polymer {Ag3[N(CH2COO)3]}n 1 which was characterized by means of elemental analysis and IR spectroscopy as well as X-ray diffraction. The single crystal structure shows that the NTA3– anions act as unusual heptadentate 13-coordination agents and the silver(i) atoms exhibit various coordination numbers in the range 3–6.

Syntheses and molecular structures of some di(amidino)monosilanes

2021 ◽  
Vol 44 (1) ◽  
pp. 228-238
Author(s):  
Markus Bös ◽  
Marcus Herbig ◽  
Uwe Böhme ◽  
Edwin Kroke
Keyword(s):  
Raman Spectroscopy ◽  
Single Crystal ◽  
High Field ◽  
Structural Features ◽  
Molecular Structures ◽  
X Ray Diffraction ◽  
One Pot ◽  
X Ray ◽  
Field Shift ◽  
Nmr Signals

Abstract The syntheses of three different amidinosilanes of the type Me2Si[N=C(Ph)R]2 with R = pyrrolidino, morpholino, and diethylamino and one derivative with the composition R2Si[N=C(Ph)R]2 with R = morpholino are reported. These compounds were prepared in one-pot syntheses including three consecutive steps. All products are analysed by single crystal X-ray diffraction, NMR, and Raman spectroscopy. The Si–N=C–N units of these compounds show characteristic structural features and cause a significant high field shift of the 29Si NMR signals.

Synthesis and Structural Characterization of Palladium Dicarbene Complexes Bearing Labile Co-Ligands

2009 ◽  
Vol 62 (9) ◽  
pp. 983 ◽  
Author(s):  
Han Vinh Huynh ◽  
Hui Xian Seow
Keyword(s):  
Single Crystal ◽  
Structural Characterization ◽  
Molecular Structures ◽  
X Ray Diffraction ◽  
Metathesis Reaction ◽  
X Ray ◽  
Low Activity

Dicarbene complexes [Pd(OAc)2(diNHC)] (2), [Pd(O2CCF3)2(diNHC)] (3), and [Pd(CNCH3)2(diNHC)](SO3CF3)2 (4) bearing labile acetato, fluoroacetato, and acetonitrile co-ligands have been synthesized via metathesis reaction of the respective precursor [PdBr2(diNHC)] (1) with Ag-salts. All complexes are stable towards air and moisture and have been fully characterized by spectroscopic and spectrometric methods. Notably and in comparison to diphosphine analogues, they resist ligand disproportionation in solution. Their molecular structures have also been determined by single crystal X-ray diffraction. A preliminary catalytic study showed low activity in the hydroamination reaction, but revealed an interesting co-ligand influence.

scholarly journals TheP43enantiomorph of Sr2As2O7

2013 ◽  
Vol 69 (12) ◽  
pp. i84-i84 ◽  
Author(s):  
Aicha Mbarek ◽  
Fadhila Edhokkar
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Single Crystal ◽  
Diffraction Data ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Coordination Numbers

The crystal structure of strontium diarsenate has been reinvestigated from single-crystal X-ray diffraction data. In contrast to the previous determinations of this structure [Weilet al.(2009).Solid State Sci.11, 2111–2117; Edhokkaret al.(2012).Mater. Sci. Eng.,28, 012017] and to all isotypicA2B2O7compounds that crystallize in the space groupP41, the current redetermination revealed theP43enantiomorph of Sr2As2O7with a purity of 96.3 (8)%. The crystal structure is made up from two eclipsed As2O7diarsenate groups (symmetry 1) with characteristically longer As—O bridging bonds [1.756 (4)–1.781 (4) Å] than the terminal As—O bonds [1.636 (4)–1.679 (4) Å] and four Sr2+sites with coordination numbers ranging from seven to nine. The building units are arranged in sheets parallel to (001).

A Speculative Discussion of the Structural Details of 1-Bromo-2-iodo-benzenes

2004 ◽  
Vol 59 (3) ◽  
pp. 264-268 ◽  
Author(s):  
Hubert Schmidbaur ◽  
Oliver Minge ◽  
Stefan Nogai
Keyword(s):  
Single Crystal ◽  
Van Der Waals ◽  
Visible Region ◽  
Molecular Structures ◽  
X Ray Diffraction ◽  
X Ray ◽  
Crystal And Molecular Structures ◽  
Structural Details ◽  
Steric Crowding ◽  
Speculative Discussion

The crystal and molecular structures of 2,4-dibromo-1-iodo-benzene (1) and 1,3-dibromo-2-iodobenzene (2) have been determined by single crystal X-ray diffraction. The proximity of two or three large halogen substituents (Br/I) induces only minor distortions of the C-C-Br/I angles (ca. 2°) and the halogen atoms remain in the plane of the molecules. These undistorted structures lead to short intramolecular, sub-van-der-Waals Br-I contacts [in the range 3.465(4) to 3.530(4) Å ]. The results suggest that the peripheral Br-I interactions have an attractive component which alleviates the repulsion out of steric crowding. The influence is associated with an absorption in the visible region and is possibly responsible for the enhanced reactivity of the 1,2-dihalobenzene molecules

Preparation and Structural Studies of Non-Symmetric Guanidinate-Supported Zirconium Complexes

2014 ◽  
Vol 67 (7) ◽  
pp. 1063 ◽  
Author(s):  
Rafael Fernández-Galán ◽  
Juan-Antonio Navarro ◽  
Fernando Carrillo-Hermosilla ◽  
Antonio Antiñolo ◽  
Isabel López-Solera ◽  
...  
Keyword(s):  
Single Crystal ◽  
Molecular Structures ◽  
Insertion Reaction ◽  
Structural Studies ◽  
X Ray Diffraction ◽  
Metathesis Reaction ◽  
X Ray ◽  
Zirconium Complexes

The new lithium guanidinate salt [Li{μ-κ1,κ2,N,N′-(NEt)(N-t-Bu)CNMe2}(THF)]2 (1) was obtained by the reaction of HNMe2 with n-BuLi and further reaction with the asymmetric carbodiimide EtN=C=N-t-Bu. Guanidinate-supported zirconium complexes [Zr{κ2,N,N′-(NEt)(N-t-Bu)CNMe2}(μ-Cl)Cl2]2 (2), [Zr{κ2,N,N′-(NEt)(N-t-Bu)CNMe2}3Cl] (4), [Zr{κ2,N,N′-(NEt)(N-t-Bu)CNMe2}2(η5-C5H5)Cl] (5) and [Zr{κ2,N,N′-(NEt)(N-t-Bu)CNMe2}(η5-C5H5)2Cl] (6) were prepared. Complexes 2, 4, and 6 were synthesized by the metathesis reaction of ZrCl4 or [ZrCl2(η5-C5H5)2] with 1. The previously described complex [Zr{κ2,N,N′-(NEt)(N-t-Bu)CNMe2}2Cl2] (3), which was prepared by the insertion reaction of EtN=C=N-t-Bu into a metal–amido bond of [Zr(NMe2)2Cl2(THF)2], allowed the new complex 5 to be obtained by reaction with NaC5H5. All of the new complexes were characterized spectroscopically and the molecular structures of 1, 4, and 6 were determined by single-crystal X-ray diffraction.

Reactions between ruthenium chlorides and trimethyl phosphite : crystal and molecular structures of RuCI3(NH3)[P(OMe)3]2

1980 ◽  
Vol 33 (1) ◽  
pp. 195 ◽  
Author(s):  
MI Bruce ◽  
DA Kelly ◽  
GM Mclaughlin ◽  
GB Robertson ◽  
IB Tomkins ◽  
...  
Keyword(s):  
Single Crystal ◽  
Diffraction Study ◽  
Molecular Structures ◽  
Trimethyl Phosphite ◽  
X Ray Diffraction ◽  
X Ray ◽  
Crystal And Molecular Structures ◽  
A Minor

The reaction between RuCl3,nH2O and P(OMe)3 affords RuCl2[P(OMe)3]4; one batch of RuCl3,-nH2O also gave amminetrichlorobis(trimethyl phosphite)ruthenium(III), RuCl3(NH3)[P(OMe)3]2, as a minor product. The structure of this complex has been determined from a single-crystal X-ray diffraction study (4598 data, R 0.065, Rw 0.090): the ruthenium is approximately octahedrally coordinated by the three mer chloro, two trans P(OMe)3 and one NH3 ligands. Crystals are monoclinic,P21/n, a 8.725(3), b 18.286(7), c 10.936(4)Ǻ, β 94.57(3)°, Z 4.

Sign in / Sign up

Export Citation Format

Share Document