Science Journal of Chemistry

Volume 10, Issue 1, February 2022

  • Synthesis, Spectroscopic, Characterization and X-ray Structures of Lanthanide(III) Complexes Derived from 1,5-bis(phenyl(pyridin-2-yl)methylene)carbonohydrazide

    Amadou Gueye, Papa Samba Camara, Mbossé Ndiaye-Gueye, Sofia Zazouli, Farba Bouyagui Tamboura, Ousmane Diouf, Nathalie Gruber, Mohamed Lamine Gaye

    Issue: Volume 10, Issue 1, February 2022
    Pages: 1-12
    Received: Dec. 29, 2021
    Accepted: Jan. 13, 2022
    Published: Jan. 21, 2022
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    Abstract: The use of 1,5-bis (phenyl (pyridin-2-yl) methylene) carbonohydrazide (H2L) in the coordination chemistry of lanthanides (III) yielded complexes in which two ligand molecules are present. The synthesis was carried out using a Ln/H2L ratio of 1/2 to lead mononuclear complexes of [Ln(H2L)2(η2-NO3)3-x](NO3)x (Ln=La (1), Sm (4), Gd (6) and Yb (7)), [Ln... Show More
  • Eating Patterns in Children, an Issue for Future Health Policy

    Bianca Elena Popovici, Maria Mitrica, Moga Marius

    Issue: Volume 10, Issue 1, February 2022
    Pages: 13-20
    Received: Feb. 03, 2021
    Accepted: Feb. 23, 2021
    Published: Jan. 28, 2022
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    Abstract: Background: Obesity and overweight have increased prevalence in children during the last decades all over the world. Objectives: The aim of this study was to determine the prevalence of overweight/obesity through the 12-18 year old schoolchildren in Brasov district and to describe eating patterns and the possible relationship between overweight/obe... Show More
  • Hopf Fibration on Relationship Between Dihedral Angle θHnHn+1[deg] and Vicinal Angle ϕ[deg], Angles Calculated from NMR Data with 3-Shere Approach and Java Script

    Carmen-Irena Mitan, Emerich Bartha, Constantin Draghici, Miron-Teodor Caproiu, Petru Filip, Robert Michael Moriarty

    Issue: Volume 10, Issue 1, February 2022
    Pages: 21-31
    Received: Jan. 30, 2022
    Accepted: Feb. 19, 2022
    Published: Feb. 28, 2022
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    Abstract: 3-Sphere theory, a hypersphere in four dimensions, is applied for calculation dihedral angles with the right stereochemistry and sign in D, -L ribitol series from proton and carbon chemical shift (ΔδXnXn+1[ppm], X = H, C) and vicinal coupling constant (3JHnHn+1[Hz]) with Java Script. A method in three steps, easy to calculate by hand or with Java S... Show More