scholarly journals Single Crystal X-ray Structural Analysis and Electronic Theory of Sugar Molecules

2020 ◽  
Vol 835 ◽  
pp. 012023
Author(s):  
Norito Taniguchi ◽  
Tomohiko Ishii ◽  
Bui Quoc Huy ◽  
Genta Sakane
Keyword(s):  
Structural Analysis ◽  
Single Crystal ◽  
X Ray ◽  
Electronic Theory

scholarly journals Single-Crystal X-Ray Structural Analysis and Electronic Structures Calculation of Rare Sugar

2020 ◽  
Vol 835 ◽  
pp. 012015
Author(s):  
Bui Quoc Huy ◽  
Tomohiko Ishii ◽  
Norito Taniguchi ◽  
Natsumi Nagayama ◽  
Genta Sakane
Keyword(s):  
Structural Analysis ◽  
Single Crystal ◽  
Electronic Structures ◽  
Rare Sugar ◽  
X Ray

Triterpenoid Constituents in the Bark of Balanops australiana

2000 ◽  
Vol 53 (9) ◽  
pp. 809 ◽  
Author(s):  
William N. Setzer ◽  
Mary C. Setzer ◽  
R. Lynton Peppers ◽  
Michael B. McFerrin ◽  
Edward J. Meehan ◽  
...  
Keyword(s):  
Natural Products ◽  
Spectral Analysis ◽  
Structural Analysis ◽  
Single Crystal ◽  
Betulinic Acid ◽  
Bark Extract ◽  
X Ray

Two new triterpenoid natural products (friedelane-3,21α-diol and friedelane-3α,28,29-triol) have been isolated from the chloroform bark extract of Balanops australiana from Paluma, north Queensland, Australia. The known triterpenoids betulinic acid, friedelin, canophyllol, zeylanol and 21α-hydroxyfriedelan-3-one were also isolated. The structures of the compounds were elucidated on the basis of spectral analysis. A single-crystal X-ray structural analysis has been carried out on 21α-hydroxyfriedelan-3-one.

A Series of Enthalpy/Entropy-Driven Reversible Dissolution/Reorganization Equilibriums in the System of Cu(NO3)2–HL–GdX3–H2O (HL=5-methylpyrazine-2-carboxylic acid; X=Cl, Br, NO3, ClO4)

2014 ◽  
Vol 67 (11) ◽  
pp. 1679
Author(s):  
Sheng Zhang ◽  
Qi Yang ◽  
Xiangyu Liu ◽  
Gang Xie ◽  
Qing Wei ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Magnetic Property ◽  
Structural Analysis ◽  
Carboxylic Acid ◽  
Single Crystal ◽  
Coordination Polymers ◽  
X Ray Diffraction ◽  
X Ray ◽  
2D Network ◽  
Thermal Stability Of

Five coordination polymers, [Cu(L)2]n (1), {[Cu(L)(Cl)(H2O)]·H2O}2n (2), [KCu(L)(μ-Cl)2]n (3), [Cu(L)(Br)H2O]n (4), and {[Cu0.5(HL)(H2O)](NO3)·H2O}2n (5) (HL = 5-methylpyrazine-2-carboxylic acid) were obtained by reactions of a pyramidal CuII-containing ligand, {[Cu(L)2(H2O)]·3H2O}n (LCu), with Gd(ClO4)3·6H2O, GdCl3·6H2O, GdCl3·6H2O/KCl, GdBr3·6H2O, or Gd(NO3)3·6H2O in water. Structural analysis reveals that the structures of these compounds range from a 0D block to a 2D network with modification of the environment of the CuII ions compared with LCu. Interestingly, there occurred a series of reversible dissolution/reorganization equilibriums between the initial reactants and the final products 1–5, which were determined as enthalpy/entropy driven chemical equilibriums by single crystal X-ray diffraction and microcalorimetry. In addition, the thermal stability of 1–4 and the magnetic property of 2 are discussed.

Structural Analysis of a Potent Seed Germination Stimulant

2005 ◽  
Vol 58 (7) ◽  
pp. 505 ◽  
Author(s):  
Gavin R. Flematti ◽  
Emilio L. Ghisalberti ◽  
Kingsley W. Dixon ◽  
Robert D. Trengove ◽  
Brian W. Skelton ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Seed Germination ◽  
Single Crystal ◽  
X Ray ◽  
Germination Stimulant ◽  
Crystallographic Study

A single-crystal X-ray crystallographic study of a seed germination stimulant isolated from plant-derived smoke confirms it to be 3-methyl-2H-furo[2,3-c]pyran-2-one 1.

scholarly journals A C-shaped p-sulfonatocalix[4]arene-based supermolecule exhibiting mutual-inclusion and bilayer insertion of dipicolinate

CrystEngComm ◽  
2014 ◽  
Vol 16 (18) ◽  
pp. 3749-3757 ◽  
Author(s):  
Ahmad Husain ◽  
Clive L. Oliver
Keyword(s):  
Structural Analysis ◽  
Single Crystal ◽  
Thermal Methods ◽  
X Ray ◽  
Hot Stage Microscopy ◽  
Hirshfeld Analysis

A p-sulfonatocalix[4]arene-based, C-shaped supermolecule, [Ce3(PDA)4(C4AS)2·13H2O](NO3)·25H2O 1 was prepared and characterized by single crystal X-ray structural analysis, thermal methods (TG, DSC and hot-stage microscopy) and Hirshfeld analysis.

Structural analysis of and selective CO2 adsorption in mixed-ligand hydroxamate-based metal–organic frameworks

2020 ◽  
Vol 49 (29) ◽  
pp. 9948-9952 ◽  
Author(s):  
Koh Sugamata ◽  
Chikaze Takagi ◽  
Keiko Awano ◽  
Teruyuki Iihama ◽  
Mao Minoura
Keyword(s):  
Structural Analysis ◽  
Single Crystal ◽  
Co2 Adsorption ◽  
Isonicotinic Acid ◽  
Metal Organic Frameworks ◽  
Mixed Ligand ◽  
Gas Sorption ◽  
X Ray ◽  
X Ray Crystallography ◽  
Metal Organic

Two mixed-ligand metal–organic frameworks using benzene-1,4-dihydroxamic acid and isonicotinic acid were synthesized and fully characterized by single-crystal X-ray crystallography as well as N2, H2, and CO2 gas-sorption measurements.

scholarly journals A nitronyl nitroxide and its two 1D chain Cu–Tb complexes: synthesis, structures, and magnetic properties

RSC Advances ◽  
2020 ◽  
Vol 10 (14) ◽  
pp. 8490-8496
Author(s):  
Meng Yang ◽  
Xiaohong Liang ◽  
Yandie Zhang ◽  
Zhijian Ouyang ◽  
Wen Dong
Keyword(s):  
Magnetic Properties ◽  
Structural Analysis ◽  
Single Crystal ◽  
Molecular Structures ◽  
Nitronyl Nitroxide ◽  
X Ray ◽  
1D Chain

A new nitronyl nitroxide and two types of one-chain Cu–Tb complexes have been successfully synthesized, and the molecular structures have been elucidated via single-crystal X-ray structural analysis.

Synthesis and Structural Studies of Tetrahedral [M(Ph2P(CH=CH)PPh2)2]BPh4 and [M(Ph2P(CH2)nPPh2)2]BPh4 (n = 2, 3) Complexes for M = Copper(I), Silver(I), and Gold(I)

2012 ◽  
Vol 65 (7) ◽  
pp. 811 ◽  
Author(s):  
Peter C. Healy ◽  
Bradley T. Loughrey ◽  
Michael L. Williams
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Structural Analysis ◽  
Single Crystal ◽  
Copper Complex ◽  
Electrospray Mass Spectrometry ◽  
Structural Studies ◽  
Space Group ◽  
X Ray ◽  
Bond Lengths

Tetraphenylborate salts of the 1 : 2 tetrahedral bis(bidentate) complexes of copper(i), silver(i), and gold(i) with cis-bis(diphenylphosphino)ethene (dppey), [M(Ph2PCH=CHPPh2)2]BPh4, cis-bis(diphenylphosphino)ethane (dppe), and cis-bis(diphenylphosphino)propane (dppp), [M(Ph2P–R–PPh2)2]BPh4 (R = (CH2)2, (CH2)3), have been prepared and characterized by NMR spectroscopy, electrospray mass spectrometry, and single crystal X-ray structural analysis at 200 K. Structures of the dppey complexes as acetone solvates show the Cu and Ag complexes to be isostructural with the previously reported Au complex, crystallizing in space group P 21/n with a ~ 25.5, b ~ 15.6, and c ~ 34.2 Å, and β ~ 103°. Structures of the dppe complexes show the copper complex to crystallize in the chiral space group P21 with a 11.8954(5), b 20.1904(5), and c 14.8999(5) Å, and β 111.366(5)°. The Ag and Au complexes are isostructural, crystallizing in space group P21/c with a ~ 17.8, b ~ 17.6, and c ~ 20.9 Å, and β ~ 107°. Structures of the dppp complexes show the copper complex to crystallize in space group P21/c with a 17.8399(4), b 19.8803(4), and c 18.7165(3) Å, and β 102.197(2)°. The Ag and Au complexes are isostructural, crystallizing in space group P21/n with a ~ 17.7, b ~ 18.6, and c ~ 19.6 Å, and β ~ 100°. Across the three series of complexes, the M–P bond lengths increase in the order Cu < Au < Ag with Cu–P = 2.281(3)–2.314(1) Å, average 2.30(1) Å; Au–P = 2.363(1)–2.4322(8) Å, average 2.40(2) Å, and Ag–P = 2.445(1)–2.5303(5) Å average 2.49(2) Å.

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