Studies of Australian soft corals. XXVIII. The structure determination of two new diterpenes from the genus Xenia (Alcyonacea)

1982 ◽  
Vol 35 (5) ◽  
pp. 997 ◽  
Author(s):  
BF Bowden ◽  
JC Coll ◽  
E Ditzel ◽  
SJ Mitchell ◽  
WT Robinson
Keyword(s):  
Single Crystal ◽  
Structure Determination ◽  
Soft Corals ◽  
X Ray

The isolation of '9-deacetoxyxenicin' [systematic name: (1R*,4aS*,7E,11aS*,1'R*,2'R*)-1-acetoxy-4-(1',2'-diacetoxy-4'-methylpent-3'-enyl)-7-methy1-11-methylene-1,4a,5,6,9,10,11,11a-octahydrocyclonona[c]pyran] (2) from Xenia crassa and a further cyclized diterpene (6) from Xenia viridis are described. The structure of (2) was derived from n.m.r. spectroscopic comparison with xenicin (1), whilst the structure of (6) was determined by a single-crystal X-ray analysis when spectroscopy failed to afford an unambiguous structure.

Studies of Australian soft corals. XXXII. The structure determination of degraded xenicin-type diterpenes from several Efflatounaria species

1983 ◽  
Vol 36 (11) ◽  
pp. 2279 ◽  
Author(s):  
BF Bowden ◽  
JC Coll ◽  
VA Patrick ◽  
DM Tapiolas
Keyword(s):  
Single Crystal ◽  
Chemical Transformation ◽  
Structure Determination ◽  
High Field ◽  
Soft Corals ◽  
X Ray ◽  
The Third

Three new diterpenes have been isolated from soft corals of the genus Efflatounaria (Coelenterata, Octocorallia, Alcyonacea, Xeniidae). The structure of the first compound (4) was elucidated on the basis of high-field 1H n.m.r. spectroscopy while that of the second metabolite (5) was determined by single-crystal X-ray analysis. The third diterpene (6) was structurally related to (5), and its structure was confirmed by chemical transformation. All three diterpenes can be derived from xenicin-type precursors, by cleavage and recyclization.

Studies of Australian Soft Corals. XLI. Structure Determination of a New Sesquiterpene From Xenia novae-britanniae and an Investigation of a Xenia Species

1987 ◽  
Vol 40 (8) ◽  
pp. 1483 ◽  
Author(s):  
BF Bowden ◽  
JC Coll ◽  
LM Engelhardt ◽  
A Heaton ◽  
AH White
Keyword(s):  
Single Crystal ◽  
Structure Determination ◽  
Soft Coral ◽  
Soft Corals ◽  
X Ray ◽  
X Ray Crystallography ◽  
Relative Stereochemistry

.A novel sesquiterpene (1 Z,2R*,4R*,7S*,11S*)-3,3,7,11-tetramethyltricyclo[6.3.0.02,4]undec-1(8)-en-4-ol (3) was isolated from the soft coral Xenia novae-britanniae. Its structure was tentatively deduced by n.m.r. spectroscopy, and the structure with relative stereochemistry was confirmed by single-crystal X-ray crystallography. Investigation of a Xenia species afforded the known metabolite waixenicin -A previously isolated from Anthelia edmondsoni .

Acid-catalyzed cyclization of 3,3',4,4'-tetrahydro-1,1'-binaphthyl and single-crystal x-ray structure determination of a polycyclic stable ozonide

1984 ◽  
Vol 49 (6) ◽  
pp. 1030-1033 ◽  
Author(s):  
Thomas K. Dobbs ◽  
Arnold R. Taylor ◽  
Julie A. Barnes ◽  
Belma D. Iscimenler ◽  
Elizabeth M. Holt ◽  
...  
Keyword(s):  
Single Crystal ◽  
Structure Determination ◽  
X Ray ◽  
Acid Catalyzed

Chain of water hexamers and tetramers hosted in a redox product of a Co(III) metal complex: Syntheses, characterization and single crystal X-ray structure determination of Co(II/III) complexes with sulfur oxo-anions

Polyhedron ◽  
2012 ◽  
Vol 40 (1) ◽  
pp. 175-184 ◽  
Author(s):  
Raj Pal Sharma ◽  
Ajnesh Singh ◽  
Paloth Venugopalan ◽  
Paula Brandão ◽  
Vitor Félix
Keyword(s):  
Metal Complex ◽  
Single Crystal ◽  
Structure Determination ◽  
X Ray ◽  
Oxo Anions

Revision of the Li–Si Phase Diagram: Discovery and Single-Crystal X-ray Structure Determination of the High-Temperature Phase Li4.11Si

2013 ◽  
Vol 25 (22) ◽  
pp. 4623-4632 ◽  
Author(s):  
Michael Zeilinger ◽  
Iryna M. Kurylyshyn ◽  
Ulrich Häussermann ◽  
Thomas F. Fässler
Keyword(s):  
Phase Diagram ◽  
High Temperature ◽  
Single Crystal ◽  
Structure Determination ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
X Ray

ChemInform Abstract: Single-Crystal X-Ray Structure Determination of Neptunium Tetrachloride.

ChemInform ◽  
2010 ◽  
Vol 26 (18) ◽  
pp. no-no
Author(s):  
M.-R. SPIRLET ◽  
X. JEMINE ◽  
J. GOFFART
Keyword(s):  
Single Crystal ◽  
Structure Determination ◽  
X Ray

Kristallzucht und Strukturaufklärung von K2[Pt(CN)4Cl2], K2[Pt(CN)4Br2], K2[Pt(CN)4I2] und K2[Pt(CN)4Cl2] · 2H2O/ Crystal Growth and Crystal Structure Determination of K2[Pt(CN)4Cl2], K2[Pt(CN)4Br2], K2[Pt(CN)4I2] and K2[Pt(CN)4]Cl2] · 2H2O

2004 ◽  
Vol 59 (5) ◽  
pp. 567-572 ◽  
Author(s):  
Claus Mühle ◽  
Andrey Karpov ◽  
Jürgen Nuss ◽  
Martin Jansen
Keyword(s):  
Crystal Structure ◽  
Infrared Spectroscopy ◽  
Crystal Growth ◽  
Single Crystal ◽  
Structure Determination ◽  
Spectroscopy Data ◽  
Crystal Data ◽  
X Ray ◽  
Raman And Infrared Spectroscopy

Abstract Crystals of K2Pt(CN)4Br2, K2Pt(CN)4I2 and K2Pt(CN)4Cl2 ·2H2O were grown, and their crystal structures have been determined from single crystal data. The structure of K2Pt(CN)4Cl2 has been determined and refined from X-ray powder data. All compounds crystallize monoclinicly (P21/c; Z = 2), and K2Pt(CN)4X2 with X = Cl, Br, I are isostructural. K2Pt(CN)4Cl2: a = 708.48(2); b = 903.28(3); c = 853.13(3) pm; β = 106.370(2)°; Rp = 0.064 (N(hkl) = 423). K2Pt(CN)4Br2: a = 716.0(1); b = 899.1(1); c = 867.9(1) pm; β = 106.85(1)°; R(F)N′ = 0.026 (N’(hkl) = 3757). K2Pt(CN)4I2: a = 724.8(1); b = 914.5(1); c = 892.1(1) pm; β = 107.56(1)°; R(F)N′ = 0.025 (N’(hkl) = 2197). K2Pt(CN)4Cl2 ·2H2O: a = 763.76(4); b = 1143.05(6); c = 789.06(4) pm; β = 105.18(1)°; R(F)N′ = 0.021 (N’(hkl) = 2281). Raman and infrared spectroscopy data are reported.

Crystal structure determination of Ag2Ga by single crystal X-ray diffraction

1998 ◽  
Vol 213 (12) ◽  
Author(s):  
A. E. Gunnæs ◽  
A. Olsen ◽  
P. T. Zagierski ◽  
B. Klewe ◽  
O. B. Karlsen ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Structure Determination ◽  
Crystal Structure Determination ◽  
X Ray Diffraction ◽  
X Ray

AbstractThe crystal structure of

Approaches to the total synthesis of triterpenes. VIII. The ABC + D/E approach. Synthesis and X-ray structure determination of 1β,4a β-dimethyl-7-methoxy-1α- (7′,7′-ethyleneketal-6′,6′-dimethyl-3′-ketooctyl)-3,4,4a,9,10,10aα-hexahydro- 2(l-H)phenanthrone

1982 ◽  
Vol 60 (4) ◽  
pp. 509-513 ◽  
Author(s):  
John W. ApSimon ◽  
Rick P. Sequin ◽  
Carol P. Huber
Keyword(s):  
Total Synthesis ◽  
Single Crystal ◽  
Structure Determination ◽  
Title Compound ◽  
Trimethylsilyl Ether ◽  
Synthetic Route ◽  
X Ray ◽  
Pentacyclic Triterpenes ◽  
Ongoing Work

The title compound was made following a projected synthetic route to pentacyclic triterpenes. The key step in the route is the alkylative trapping of the enolate derived from the enol trimethylsilyl ether 8. The stereochemical consequence of this reaction is confirmed by a single crystal X-ray structure determination on 4, which although of no further utility in the projected synthesis, nevertheless served as a useful template for this determination. In this way, ongoing work in a parallel series of compounds rests on a firm stereochemical footing.

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