Structure and properties of oxycations. IV. Spectroscopic studies on complex compounds with some organophosphorus ligands

1969 ◽  
Vol 3 ◽  
pp. 59-64 ◽  
Author(s):  
A. Bractecki ◽  
D. Dembicka
Keyword(s):  
Spectroscopic Studies ◽  
Complex Compounds ◽  
Structure And Properties

Synthesis, structure, and properties of new difficultly soluble complex compounds of technetium with diethylenetriaminepentaacetic acid

2011 ◽  
Vol 53 (2) ◽  
pp. 178-185 ◽  
Author(s):  
K. E. German ◽  
A. B. Melent’ev ◽  
Ya. V. Zubavichyus ◽  
S. N. Kalmykov ◽  
A. A. Shiryaev ◽  
...  
Keyword(s):  
Complex Compounds ◽  
Diethylenetriaminepentaacetic Acid ◽  
Structure And Properties ◽  
Soluble Complex

STRUCTURE AND PROPERTIES OF THE HETEROLIGANDIC COMPLEX COMPOUNDS OF GADOLINIUM STEARATE WITH BENZOYLTRIFLUOROACETONE

2021 ◽  
Vol 62 (4) ◽  
Author(s):  
С.Н. Иванин ◽  
В.Ю. Бузько ◽  
М.Е. Соколов ◽  
М.А. Магомадова ◽  
В.Т. Панюшкин
Keyword(s):  
Complex Compounds ◽  
Structure And Properties

Preparation and Properties of Rubberlike High Polymers. IV. Correlation between Structure and Properties of Elastomers Derived from Dienes

1948 ◽  
Vol 21 (2) ◽  
pp. 377-397
Author(s):  
G. Salomon ◽  
C. Koningsberger
Keyword(s):  
Natural Rubber ◽  
Elevated Temperatures ◽  
Elastic Recovery ◽  
Chain Structure ◽  
Complex Compounds ◽  
Structure And Properties ◽  
Straight Chain ◽  
Gutta Percha ◽  
Brittle Point ◽  
Derivatives Of

Abstract The correlation between structure and properties of elastomers prepared from dienes, natural rubber, gutta-percha, as well as those of some significant derivatives of natural rubber, are discussed. The similar influence exerted by methyl groups on the brittle point, elastic recovery, and permeability to gases is demonstrated and separated from the effect caused by insertion of —CH2— CHR— groups in straight-chain polybutadiene, which takes place during co-polymerization or 1,2 addition. The preponderant influence of an unbranched-chain structure on tensile strength at elevated temperatures and in the swollen state is illustrated. Complex compounds with silver nitrate provide further evidence for the particular symmetry of the natural rubber chain: They are reinforcing agents for synthetic elastomers. The brittle points of hydrochlorides from natural rubber, gutta-percha, and polyisoprene are compared with those of polyvinyl compounds. Correlation between the structure of molecular units in a polymeric paraffin derivative and its elasticity is pointed out.

scholarly journals SYNTHESIS, STRUCTURE AND PROPERTIES OF COMPLEX COMPOUNDS OF ANTHANOIDS WITH 4 - [(3,4-DIMETOXYBENZYL) AMINO] BENZOIC ACID

2020 ◽  
Vol 6 (7(76)) ◽  
pp. 28-31
Author(s):  
Medina Humaidovna Shamsutdinova ◽  
Zara Sultanovna Ilkhaeva ◽  
Alet Ilyasovna Khasaeva
Keyword(s):  
Benzoic Acid ◽  
Coordination Compounds ◽  
Metal Ion ◽  
Earth Metal ◽  
Complex Compounds ◽  
Carboxyl Group ◽  
Structure And Properties ◽  
Mercury Lamp ◽  
Infrared Absorption Spectra ◽  
Amino Benzoic Acid

The synthesis of complex compounds of 4 - [(3,4-dimethoxybenzyl) amino] benzoic acid (HL) with ions of samarium (III), europium (III), terbium (III), gadolinium (III) and dysprosium (III). According to the data of elemental analysis and thermogravimetry, the obtained complexes are hydrates of the composition LnL3 · nH2O, where n = 0-2. The area of their thermal stability is in the range from 100 ° С to 150 ° С. Electronic and infrared absorption spectra of the ligand and complexes with rare-earth metal ions have been measured. According to the IR spectra, the coordination of the ligand with the metal ion occurs at the carboxyl group. The carboxyl group is bidentate coordinated. To excite luminescence, a line of a mercury lamp with a wavelength of 248 nm was used. The highest luminescence intensity is observed for the coordination compounds Eu3 +, Tb3 +, Sm3 +, and Dy3 +.

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