scholarly journals X-ray structure of hexamethyl benzenehexacarboxylate, [C6(COOCH3)6]

1970 ◽  
Vol 34 (2) ◽  
pp. 197-200
Author(s):  
Shishir Ghosh ◽  
Md Kamal Hossain ◽  
Shariff E Kabir ◽  
Noorjahan Begum
Keyword(s):  
Thermal Treatment ◽  
Single Crystal ◽  
Diffraction Study ◽  
Key Words ◽  
Spectroscopic Data ◽  
Monoclinic Space Group ◽  
Dimethyl Acetylenedicarboxylate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Academy Of Sciences

The thermal treatment of [Ru2(CO)6(μ-η1,η2-C4H3O){μ-P(C4H3O)2}] 1 with dimethyl acetylenedicarboxylate (DMAD) at 110 °C leads to cyclotrimerization of DMAD. The cyclotrimerization product hexamethyl benzenehexacarboxylate, [C6(COOCH3)6] 2, was obtained in 37% yield and characterized by a combination of spectroscopic data and single crystal X-ray diffraction study. Compound 2 crystallizes in the monoclinic space group P1bar with a = 10.3002(12), b = 11.0371(13), c = 18.781(2) Å, α = 76.148(2), β = 87.390(2), γ = 74.001(2)°, Z = 4 and V = 1992.2(4) Å3. Key words: Cyclotrimerization; Dimethyl acetylenedicarboxylate; X-ray structure DOI: 10.3329/jbas.v34i2.6866Journal of Bangladesh Academy of Sciences, Vol. 34, No. 2, 197-200, 2010

Reactions of Transition-Metal Sigma-Acetylides. V. Synthesis and X-Ray Structure of Co2(µ-η2-PhC2Fe(Co)2(η-C5h5))(Co)6

1986 ◽  
Vol 39 (1) ◽  
pp. 159 ◽  
Author(s):  
MI Bruce ◽  
DN Duffy ◽  
MG Humphrey
Keyword(s):  
Molecular Structure ◽  
Transition Metal ◽  
Single Crystal ◽  
Diffraction Study ◽  
Title Complex ◽  
Monoclinic Space Group ◽  
Independent Data ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray

The reaction between Co2(CO)8 and Fe(C2Ph)(CO)2(η-C5H5) gave the title complex in 44% yield. The molecular structure was determined from a single-crystal X-ray diffraction study, and consists of the transition metal acetylide acting as a conventional μ- alkyne ligand to a Co2(CO)6 unit. Crystals are monoclinic, space group P21/n, with a 11.610(8), b 14.657(4), c 12.526(6)Ǻ, β 90.30(5)°, and Z 4; 1683 independent data were refined to R 0.080, Rw 0.087.

(+)-Iforrestine: a Novel Heterocyclic Nephrotoxin From Isotropis forrestii

1989 ◽  
Vol 42 (8) ◽  
pp. 1249 ◽  
Author(s):  
SM Colegate ◽  
PR Dorling ◽  
CR Huxtable ◽  
TJ Shaw ◽  
BW Skelton ◽  
...  
Keyword(s):  
Single Crystal ◽  
Diffraction Study ◽  
Spectroscopic Data ◽  
The Novel ◽  
X Ray Diffraction ◽  
X Ray ◽  
Tubular Necrosis ◽  
Proximal Tubular ◽  
Renal Proximal Tubular ◽  
Heterocyclic Structure

A compound that reproduces the acute renal proximal tubular necrosis associated with ingestion of Isotropis forrestii, by animals, has been isolated from the plant. The novel heterocyclic structure was determined by a single-crystal X-ray diffraction study. The spectroscopic data are presented and rationalized with respect to the assigned structure.

The first proof of protonated anion tetrahedra in the tsumcorite-type compounds

2004 ◽  
Vol 68 (5) ◽  
pp. 757-767 ◽  
Author(s):  
T. Mihajlović ◽  
H. Effenberger
Keyword(s):  
Crystal Structure ◽  
Hydrothermal Synthesis ◽  
Single Crystal ◽  
Diffraction Data ◽  
Title Compound ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Hydrogen Atoms ◽  
Synthetic Compounds ◽  
X Ray

AbstractHydrothermal synthesis produced the new compound SrCo2(AsO4)(AsO3OH)(OH)(H2O). The compound belongs to the tsumcorite group (natural and synthetic compounds with the general formula M(1)M(2)2(XO4)2(H2O,OH)2; M(1)1+,2+,3+ = Na, K, Rb, Ag, NH4, Ca, Pb, Bi, Tl; M(2)2+,3+ = Al, Mn3+, Fe3+, Co, Ni, Cu, Zn; and X5+,6+ = P, As, V, S, Se, Mo). It represents (1) the first Sr member, (2) the until now unknown [7]-coordination for the M(1) position, (3) the first proof of (partially) protonated arsenate groups in this group of compounds, and (4) a new structure variant.The crystal structure of the title compound was determined using single-crystal X-ray diffraction data. The compound is monoclinic, space group P21/a, with a = 9.139(2), b = 12.829(3), c = 7.522(2) Å, β = 114.33(3)°, V = 803.6(3) Å3, Z = 4 [wR2 = 0.065 for 3530 unique reflections]. The hydrogen atoms were located experimentally.

Structural Study of an Unusual Diels-Alder Adduct

1992 ◽  
Vol 45 (12) ◽  
pp. 2089 ◽  
Author(s):  
EL Ghisalberti ◽  
BW Skelton ◽  
AH White
Keyword(s):  
Single Crystal ◽  
Diffraction Study ◽  
Structural Study ◽  
Spectroscopic Studies ◽  
Diels Alder ◽  
X Ray Diffraction ◽  
X Ray ◽  
Naturally Occurring ◽  
Chemical Evidence ◽  
Alder Adduct

The structure of the compound obtained on heating the naturally occurring clerodane furanoditerpene (1) had been formulated as (2) on the basis of spectroscopic studies. A single-crystal X-ray diffraction study on the dihydro derivative of (2) has confirmed this and provides support for the stereochemistry previously assigned to (1) on the basis of chemical evidence.

New iboga-type alkaloids from Ervatamia hainanensis

RSC Advances ◽  
2016 ◽  
Vol 6 (36) ◽  
pp. 30277-30284 ◽  
Author(s):  
Zhi-Wen Liu ◽  
Xiao-Jun Huang ◽  
Han-Lin Xiao ◽  
Guo Liu ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Spectroscopic Data ◽  
X Ray Diffraction ◽  
X Ray

The structures and absolute configurations of seven new iboga-type alkaloids 1–7 were determined by spectroscopic data, Mosher's method, single crystal X-ray diffraction and ECD analyses.

Single crystal X-ray diffraction study of the HgBa2CuO4+δ superconducting compound

1996 ◽  
Vol 271 (3-4) ◽  
pp. 189-196 ◽  
Author(s):  
P Bordet ◽  
F Duc ◽  
S LeFloch ◽  
J.J Capponi ◽  
E Alexandre ◽  
...  
Keyword(s):  
Single Crystal ◽  
Diffraction Study ◽  
X Ray Diffraction ◽  
X Ray ◽  
Superconducting Compound
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