Bis and tris(oxalato)ferrate(iii) complexes as precursors of polynuclear compounds

CrystEngComm ◽  
2005 ◽  
Vol 7 (7) ◽  
pp. 57 ◽  
Author(s):  
Donatella Armentano ◽  
Giovanni De Munno ◽  
Francesc Lloret ◽  
Miguel Julve
Keyword(s):  
Polynuclear Compounds

A novel triazidoruthenium(iii) building block for the construction of polynuclear compounds

2012 ◽  
Vol 41 (19) ◽  
pp. 5794 ◽  
Author(s):  
Jing Xiang ◽  
Li-Hui Jia ◽  
Wai-Lun Man ◽  
Kang Qian ◽  
Gene-Hsiang Lee ◽  
...  
Keyword(s):  
Building Block ◽  
Polynuclear Compounds

Triribbed-Functionalized Clathrochelate Iron(II) Dioximates as a New and Promising Tool To Obtain Polynucleating and Polynuclear Compounds with Improved Properties

2000 ◽  
Vol 39 (9) ◽  
pp. 1907-1918 ◽  
Author(s):  
Yan Z. Voloshin ◽  
Oleg A. Varzatskii ◽  
Tatyana E. Kron ◽  
Vitaly K. Belsky ◽  
Valery E. Zavodnik ◽  
...  
Keyword(s):  
Polynuclear Compounds ◽  
Promising Tool

The Extraction and Determination of Polynuclear Hydrocarbons in Paraffin Waxes

1963 ◽  
Vol 46 (6) ◽  
pp. 933-941
Author(s):  
John W Howard ◽  
Edward O Haenni
Keyword(s):  
Dimethyl Sulfoxide ◽  
Absorption Spectra ◽  
Partition Coefficients ◽  
Paraffin Wax ◽  
Chromatographic Techniques ◽  
Polynuclear Compounds ◽  
Pure Compounds ◽  
Background Material ◽  
Paraffin Waxes

Abstract A method for the isolation and determination of polynuclear hydrocarbons in paraffin wax has been developed in which polynuclear compounds are extracted from the wax by diluting a melted wax solution with an aliphatic solvent and extracting the resulting solution with dimethyl sulfoxide. Paper chromatographic techniques are used to separate the compounds from the background material extracted from the wax. The hydrocarbons are rechromatographed until their ultraviolet absorption spectra are comparable to those obtained for pure compounds. Recoveries of 19 polynuclear hydrocarbons added to 100 g samples of paraffin wax at levels of 0.1 ppm or less ranged from 62 to 96%. Recoveries of benzo(a)pyrene and dibenz(a, h) anthracene added to 100 g or 500 g of wax at levels as low as 0.02 ppm or 0.005 ppm, respectively, were in the range 90—100%. The variations in the recoveries are apparently caused by differences in the partition coefficients of the hydrocarbons between the aliphatic solvent and dimethyl sulfoxide and at lower levels by the tendency of some of the compounds to be oxidized. The method has been utilized for the determination of polynuclear hydrocarbons in commercial waxes.

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