scholarly journals Preparation, characterization and crystal structure of the complex formed between N,N,N',N'-tetrabutylmalonamide and lanthanum(III)nitrate

2006 ◽  
Vol 71 (5) ◽  
pp. 513-519 ◽  
Author(s):  
Y.U. Cui ◽  
Guo-Xin Sun ◽  
Zhen-Wei Zhang ◽  
Si-Xiu Sun
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Extraction Method ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Nitrate Ions ◽  
Triclinic System ◽  
Oxygen Atoms

The complex [La(NO 3)3(TBMA)2] (TBMA = N,N,N?,N?-tetrabutylmalonamide) was prepared by the extraction method and characterized by single-crystal X-ray diffraction. The complex consists of two bidentate TBMA extractant and three bidentate nitrate ions coordinated to a La3+ ion. The lanthanum(III) is 10-coordinate, being bonded to four oxygen atoms of the malonamides and six oxygen atoms of the three nitrates. The crystal data are as follows C38H76N7O13La, Mr = 977.97, triclinic system, space group P 1, a = 1.3025(12), b = 1.4353(14), c = 0.4871(13) nm, ? = 70.025(17), ? = 71.411(19), ? = 84.017(18)?, V = 2.476(4) nm3, Z = 2, F(000) = 1028, D = 1.312 g.cm-3, R 1 = 0.0833, wR 2 = 0.1471.

Schwermetall-π-Komplexe II [1] Arenkomplexe des Quecksilbers(I)

1987 ◽  
Vol 42 (7) ◽  
pp. 828-834 ◽  
Author(s):  
W. Frank ◽  
B. Dincher
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Diffraction Data ◽  
Monoclinic Space Group ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Aluminium Trichloride

Abstract The crystalline compounds [(CH3C6H5)2Hg,][AlCl4]2 (1), [(1,2-(CH3)2C6H4)2Hg2][AlCl4]2(2), [(1,3,5-(CH3)3C6H3)2Hg2][AlCl4]2 (3), [1,2,4,5-(CH3)4C6H2Hg2][AlCl4]2 (4) and [((CH3)6C6)2Hg2][AlCl4]2-CH3C6H5 (5) have been prepared from mercury(I)chloride, aluminium trichloride and the corresponding arenes and characterized by elem ental analysis. The crystal structure of 5 has been determ ined from single crystal X-ray diffraction data and refined to R - 0.093 for 3269 unique reflections. Crystal data: monoclinic, space group P21/c, a = 2116(1), b = 1095.1(7), c = 1880(1) pm, β - 104,9(1)°, Z = 4. Each atom of a central Hg2 unit (Hg -Hg distance 251.5 pm) is asymmetrically complexed by hexamethylbenzene, the Hg - Carene distances being in the range from 241 to 340 pm. Two distorted AlCl4 tetrahedra complete a “molecular” [arene2Hg2][AlCl4]2 unit. The shortest Hg-Cl distances are 310 and 312 pm, respectively.

Crystal structure of triclinic rubidium dichromate, Rb2Cr2O7

1970 ◽  
Vol 48 (4) ◽  
pp. 537-543 ◽  
Author(s):  
N. Ch. Panagiotopoulos ◽  
I. D. Brown
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Least Squares ◽  
Unit Cell ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Dichromate Ions ◽  
Oxygen Atoms

The crystal structure of triclinic rubidium dichromate has been determined by single crystal X-ray diffraction. The crystal belongs to space group [Formula: see text] with a = 13.554, b = 7.640, c = 7.735 Å, α = 93.64°, β = 98.52°, γ = 88.80° and has four Rb2Cr2O7 units in the unit cell. The final weighted agreement index after refinement by least-squares analysis is 0.058. The configuration of the dichromate ions is similar to that found in most other dichromate structures (Cr—O (bridging) = 1.78 Å, Cr—O (terminal) = 1.62 Å). The two non-equivalent Cr—O—Cr angles are 123 and 137°. The rubidium ions are surrounded by either 8 or 9 oxygen atoms at distances ranging from 2.86 to 3.31 Å. The structure of triclinic Rb2Cr2O7 is similar, but not identical, to that of triclinic K2Cr2O7.

Crystal structure of Sc3Co1.64In4 and Sc10Co9In20 from single-crystal data

2019 ◽  
Vol 74 (3) ◽  
pp. 289-295 ◽  
Author(s):  
Nataliya Gulay ◽  
Yuriy Tyvanchuk ◽  
Marek Daszkiewicz ◽  
Bohdan Stel’makhovych ◽  
Yaroslav Kalychak
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Crystal Structures ◽  
Diffraction Data ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Arc Melting ◽  
Pure Metals

AbstractTwo compounds in the Sc-Co-In system were obtained by arc-melting of the pure metals and their crystal structures have been determined using single crystal X-ray diffraction data. The structure of Sc3Co1.64In4 (space group P6̅, а=7.6702(5), c=3.3595(2) Å, Z=1, R1=0.0160, wR2=0.0301) belongs to the Lu3Co2−xIn4 type structure, which is closely related to the ZrNiAl and Lu3CoGa5 types. The structure of Sc10Co9In20 (space group P4/nmm, а=12.8331(1), c=9.0226(1) Å, Z=2, R1=0.0203, wR2=0.0465) belongs to the Ho10Ni9In20 type, which is closely related to HfNiGa2.

Preparation and Crystal Structure of New 1,3-Diaza-λ5,λ5-diphosphetidines

1986 ◽  
Vol 41 (10) ◽  
pp. 1201-1205 ◽  
Author(s):  
Ch. Donath ◽  
M. Meisel ◽  
K .-H . Jost ◽  
K. K. Palkina ◽  
S. I. Maksimova ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Methyl Ester ◽  
Single Crystal ◽  
Fractional Crystallization ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
Triclinic Space Group ◽  
Space Group ◽  
X Ray ◽  
Benzyl Amine

Abstract Reaction of py · PS2Cl (py = pyridine) with benzyl amine in the presence of NEt3 yields triethyl-ammonium 1,3-dibenzyl-2,4-dithioxo-1,3-diaza-2λ5,4λ5-diphosphetidine-2,4-dithiolate which reacts with MeI to give the corresponding methyl ester. By fractional crystallization from cyclohexane three modifications of the methyl ester were obtained (two trans-(A and A') and one cis-modification (B)). The crystal structure of these modifications have been determined by single crystal X-ray diffraction. Crystal data: A: triclinic, space group P1̄ , Z = 2, a = 7.100(3), b = 10.088(6), c = 17.785(6) Å , α = 99.18(4)°, β = 93.75(5)°, γ = 106.96(4)°, A': monoclinic, P21/c, Z = 2, a = 7.933(3), b = 13.689(3), c = 9.917(4) Å, β = 111.98(3)°; B: orthorhombic, P cab, Z = 8, a = 12.962(6), b = 16.581(6), c = 19.475(7).

Crystal structure and thermal chemical properties of 2-(2,4-dimethylanilino)-3-methyl-6-diethylaminofluorane

2006 ◽  
Vol 60 (3) ◽  
Author(s):  
X. Li ◽  
C. Ding ◽  
B. Tian ◽  
Q. Liu ◽  
S. Zhang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Chemical Properties ◽  
Diffraction Method ◽  
Unit Cell ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Triclinic System

AbstractThe crystal structure of 2-(2,4-dimethylanilino)-3-methyl-6-diethylaminofluorane has been determined by single crystal X-ray diffraction method. The crystal belongs to triclinic system, space group P-1 with unit cell constants a = 11.2877(9) Å, b = 11.9539(9) Å, c = 12.2365(9) Å, α = 97.2580(10)°, β = 116.2850(10)°, γ = 106.3710(10)°, V = 1358.48(18) Å 3, Z = 2, D c = 1.234 g/cm3, μ = 0.079 mm−1, F(000) = 536, R and w(R) are 0.0718 and 0.2055, respectively, for 5239 unique reflections with 3745 observed reflections (I > 2σ(I)).

scholarly journals Indole type akuammiline from Vinca erecta: Crystal structure of 10-OAc-Akuammine

2019 ◽  
Vol 10 (4) ◽  
pp. 345-349 ◽  
Author(s):  
Shahobiddin Adizov ◽  
Bakhodir Tashkhodjaev
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Absolute Configuration ◽  
Indole Alkaloids ◽  
Acyl Derivative ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
X Ray

Single crystal X-ray diffraction has established the absolute configuration of the indole alkaloids from Vinca erecta such as akuammiline-o-acyl derivative of akuammine with a 3D stable polycyclic framework. Crystal data for C24H28N2O5: orthorhombic, space group P212121 (no. 19), a = 7.349(3) Å, b = 16.099(5) Å, c = 17.323(5) Å, V = 2049.5(12) Å3, Z = 4, T = 293(2) K, μ(CuKα) = 0.789 mm-1, Dcalc = 1.376 g/cm3, 1742 reflections measured (7.496° ≤ 2Θ ≤ 119.792°), 1742 unique (Rsigma = 0.0374) which were used in all calculations. The final R1 was 0.0608 (I > 2σ(I)) and wR2 was 0.1680 (all data). The polycyclic framework of the well-known picrinine and akuammine is compared. The ether bridges located in different positions of the framework and forming five-membered cycles do not change the conformation of the polycyclic akuammiline framework. In V. erecta alkaloids, the exomethylene fragment (C18-C19=C20-C21) of the polycyclic backbone always takes on the E-condition.

Crystal structure of an inclusion complex between chiral monoaza-15-crown-5 and S(–)-1-phenyl-ethyl ammonium percholorate

2003 ◽  
Vol 218 (5) ◽  
Author(s):  
Süheyla Özbey ◽  
F. B. Kaynak ◽  
M. Toğrul ◽  
N. Demirel ◽  
H. Hoşgören
Keyword(s):  
Crystal Structure ◽  
Inclusion Complex ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
New Type

AbstractA new type of inclusion complex, S(–)-1 phenyl ethyl ammonium percholorate complex of R-(–)-2-ethyl - N - benzyl - 4, 7, 10, 13 - tetraoxa -1- azacyclopentadecane, has been prepared and studied by NMR, IR and single crystal X-ray diffraction techniques. The compound crystallizes in space group

Single-crystal investigation of Ce5AgxGe4−x (x = 0.1−1.08) with Sm5Ge4 type

2020 ◽  
Vol 75 (8) ◽  
pp. 765-768
Author(s):  
Bohdana Belan ◽  
Dorota Kowalska ◽  
Mariya Dzevenko ◽  
Mykola Manyako ◽  
Roman Gladyshevskii
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Diffraction Data ◽  
Binary Compound ◽  
Lattice Parameters ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray

AbstractThe crystal structure of the phase Ce5AgxGe4−x (x = 0.1−1.08) has been determined using single-crystal X-ray diffraction data for Ce5Ag0.1Ge3.9. This phase is isotypic with Sm5Ge4: space group Pnma (No. 62), Pearson code oP36, Z = 4, a = 7.9632(2), b = 15.2693(5), c = 8.0803(2) Å; R1 = 0.0261, wR2 = 0.0460, 1428 F2 values and 48 variables. The two crystallographic positions 8d and 4c show Ge/Ag mixing, leading to a slight increase in the lattice parameters as compared to those of the pure binary compound Ce5Ge4.

scholarly journals β-Y(BO2)3 – a new member of the β-Ln(BO2)3 (Ln=Nd, Sm, Gd–Lu) structure family

2017 ◽  
Vol 72 (12) ◽  
pp. 983-988 ◽  
Author(s):  
Martin K. Schmitt ◽  
Hubert Huppertz
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Lattice Parameters ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
X Ray

Abstractβ-Y(BO2)3 was synthesized in a Walker-type multianvil module at 5.9 GPa/1000°C. The crystal structure has been elucidated through single-crystal X-ray diffraction. β-Y(BO2)3 crystallizes in the orthorhombic space group Pnma (no. 62) with the lattice parameters a=15.886(2), b=7.3860(6), and c=12.2119(9) Å. Its crystal structure will be discussed in the context of the isotypic lanthanide borates β-Ln(BO2)3 (Ln=Nd, Sm, Gd–Lu).

scholarly journals CRYSTAL STRUCTURE OF THE NEW SILICIDE Lu3Ni11.74(2)Si4

2020 ◽  
Vol 86 (5) ◽  
pp. 3-12
Author(s):  
Bohdana Belan ◽  
Mykola Manyako ◽  
Mariya Dzevenko ◽  
Dorota Kowalska ◽  
Roman Gladyshevskii
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Type Structure ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Arc Melting ◽  
Pearson Symbol ◽  
Ternary Silicide

The new ternary silicide Lu3Ni11.74(2)Si4 was synthesized from the elements by arc-melting and its crystal structure was determined by the single-crystal X-ray diffraction. The compound crystallizes in the Sc3Ni11Ge4-type: Pearson symbol hP37.2, space group P63/mmc (No. 194), a = 8.0985(16), c = 8.550(2) Å, Z = 2; R = 0.0244, wR = 0.0430 for 244 reflections. The silicide Lu3Ni11.74(2)Si4 is new member of the EuMg5.2-type structure family.

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