A simple method of calculating the molecular rotations of the sulfur, nitrogen and phosphorus analogues of α-D-glycopyranoses having different substituents at the anomeric carbon atom

1984 ◽  
Vol 37 (5) ◽  
pp. 971 ◽  
Author(s):  
B Poh
Keyword(s):  
Carbon Atom ◽  
Phosphorus Atom ◽  
Nitrogen And Phosphorus ◽  
Simple Method ◽  
Anomeric Carbon ◽  
Molecular Rotations ◽  
Anomeric Carbon Atom

The values of m and I of equation (1) for several series of α-D-glycopyranoses having different substituents at the anomeric carbon atom have been obtained earlier. From these values, the molecular rotations of the corresponding sugars containing a sulfur, nitrogen, or phosphorus atom in the ring have been calculated and found to agree satisfactorily with the corresponding literature values.

gem-Difluorination versus 1,2-migration and fragmentation in the reaction of 2- and 3-uloses with DAST. Influence of stereochemistry at the anomeric carbon atom

1991 ◽  
Vol 56 (14) ◽  
pp. 4556-4559 ◽  
Author(s):  
Anas El-Laghdagh ◽  
Raouf Echarri ◽  
M. Isabel Matheu ◽  
M. Isabel Barrena ◽  
Sergio Castillon ◽  
...  
Keyword(s):  
Carbon Atom ◽  
Anomeric Carbon ◽  
Anomeric Carbon Atom

ChemInform Abstract: gem-Difluorinations versus 1,2-Migration and Fragmentation in the Reaction of 2- and 3-Uloses with DAST. Influence of Stereochemistry at the Anomeric Carbon Atom.

ChemInform ◽  
2010 ◽  
Vol 22 (47) ◽  
pp. no-no
Author(s):  
A. EL-LAGHDACH ◽  
R. ECHARRI ◽  
M. I. MATHEU ◽  
M. I. BARRENA ◽  
S. CASTILLON ◽  
...  
Keyword(s):  
Carbon Atom ◽  
Anomeric Carbon ◽  
Anomeric Carbon Atom

scholarly journals A soft phosphorus atom to “harden” an erbium(iii) single-ion magnet

2018 ◽  
Vol 9 (38) ◽  
pp. 7540-7545 ◽  
Author(s):  
Shi-Ming Chen ◽  
Jin Xiong ◽  
Yi-Quan Zhang ◽  
Qiong Yuan ◽  
Bing-Wu Wang ◽  
...  
Keyword(s):  
Carbon Atom ◽  
Phosphorus Atom ◽  
Blocking Temperature

A single-ion magnet (Dsp)Er(COT) was obtained by replacing a carbon atom of [Cp*]− in (Cp*)Er(COT) by a soft P atom. Both relaxation barrier and blocking temperature are improved.

Synthese von vier- und achtgliedrigen Heterocyclen, die Schwefel, Stickstoff und Phosphor enthalten, und die Röntgenstrukturanalyse eines phosphorhaltigen achtgliedrigen SN-Ringes / Synthesis of Four- and Eight-Membered Heterocycles Containing Sulfur, Nitrogen and Phosphorus and the X-ray Structure of a Phosphorus-Containing Eight-Membered SN-Ring

1980 ◽  
Vol 35 (9) ◽  
pp. 1130-1136 ◽  
Author(s):  
Herbert W. Roesky ◽  
Sushil K. Mehrotra ◽  
Christoph Platte ◽  
Djamrnschid Amirzadeh-Asl ◽  
Bernhard Roth
Keyword(s):  
Tertiary Amine ◽  
Phosphorus Atom ◽  
Mass Spectra ◽  
Phosphorus Pentachloride ◽  
Membered Ring ◽  
Phosphonium Salts ◽  
Nitrogen And Phosphorus ◽  
Orthorhombic Space Group ◽  
X Ray ◽  
Phosphorus Containing

Eight-membered rings of the composition [SO2(NR)2PR′]2 3a-d with R = CH3, C2H5, and R′ = CH3, C6H5, were prepared from substituted sulfamides and dichlorophosphanes in the presence of a tertiary amine. These molecules were characterized on the basis of 1H and 31P NMR investigations and of mass spectra. 3 a reacts with phosphorus pentachloride to yield the spirocyclic derivative 4 with the phosphorus atom in the center of two four-membered rings. Methyliodide reacts with 3 a and 3 b under opening of the eight- membered ring and formation of phosphonium salts. The structure of 3 b is discussed in detail. 8b crystallizes in the orthorhombic space group Pna 21 with a = 12.60(0), b = 13.27(1), c = 12.62(4) Å.

Loss of organic matter, elements, and organic fractions in decomposing Eucalyptus microcarpa leaf litter

1987 ◽  
Vol 65 (12) ◽  
pp. 2601-2606 ◽  
Author(s):  
J. Maheswaran ◽  
P. M. Attiwill
Keyword(s):  
Organic Matter ◽  
Mass Loss ◽  
Leaf Litter ◽  
Organic Fraction ◽  
Nitrogen And Phosphorus ◽  
Simple Method ◽  
Organic Fractions

The losses of organic matter, elements and organic fractions during the decomposition of Eucalyptus microcarpa Maiden leaf litter were measured in litterbags. The concentrations of nitrogen and phosphorus in litter increased for most of the decomposition period. At the end of 15 months the amounts of elements lost were in the order K > Na > Mg > P > N >Ca. A simple method to determine the different organic fractions according to the degree of decomposability and using a small quantity of litter (0.1 – 0.5 g) was developed. The mass loss during the initial 3 months was most closely related to the amount of light organic fraction in the litter, while during the final 12 months the mass loss was most closely related to the harder organic fractions in the litter.

scholarly journals [(1,2,5,6-η)-Cycloocta-1,5-diene](1-ethyl-3-isopropyl-1,3-imidazol-2-ylidene)(triphenylphosphane)rhodium(I) tetrafluoridoborate

IUCrData ◽  
2021 ◽  
Vol 6 (6) ◽  
Author(s):  
Jeffrey A. Rood ◽  
Chhatra B. Subedi ◽  
John P. Risell ◽  
Andrei V. Astashkin ◽  
Edward Rajaseelan
Keyword(s):  
Carbon Atom ◽  
Phosphorus Atom ◽  
Counter Anion ◽  
Cationic Complex ◽  
Coordination Sites ◽  
Square Planar ◽  
Planar Environment

A new N-heterocyclic cationic rhodium(I) complex with a tetrafluoridoborate counter-anion, [Rh(C8H14N2)(C8H12)(C18H15P)]BF4, has been prepared and structurally characterized. The cationic complex exhibits a distorted square-planar environment around the rhodium(I) ion. Two connections are made from rhodium(I) to the carbon atom of an N-heterocylic carbene ligand and to the phosphorus atom of a triphenylphosphane ligand. The remaining two coordination sites are made via a bidentate interaction from the two olefinic bonds of cyclooctadiene to the rhodium(I) ion. The compound includes an out-sphere tetrafluoridoborate counter-anion. Within the crystal of the compound exist several weak intermolecular C—H...F interactions.

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