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Crystal Structure and Magnetic Property of a Two-Dimensional Copper(II) Complex with Dual EO- and Single EE-Azide Bridges

Ling Y., Zhang L.

Polish Journal of Chemistry

2009

Vol. 83, nr 4

547-554

A novel two-di men sional cop per com plex con nected by dual EO- and sin gle EE-azide bridges, [Cu(AMP)(mi1,1-N3)(mi1,3-N3)]n (1) (AMP = 2-(aminomethyl)pyridine), has been syn the sized and characterized by IR spectrum, elemental analysis, and single crystal X-ray determination. Each Cu atom is six-coordinate in an octahedral configuration in - volving two N atoms of AMP ligand and four N atoms from four azide bridges. The N atom in EO-azide bridge occupies equatorial plane in one Cu(II) center and axial position in the other Cu(II) center. The Jahn-Teller effect on the octahedral geometry of Cu(II) plays a prominent role in length en ing the Cu-N distances in axial position. Magnetic susceptibility has been investigated and reveals that azides mediate antiferromagnetic interactions with J = –16.9 cm–1 and J'= –0.83 cm–1, respectively for EO and EE bridges.

Synthesis, Crystal Structure and Properties of Transition Metal-Azide Compounds with Bis(pyrazol-1-yl)methane

Zhang L., Gao H., Ge Y., Peng F., Xue H.

Polish Journal of Chemistry

2006

Vol. 80, nr 9

1465-1471

Two new compounds, Co(bpm)2(N3)2 (1) and {[Ni(bpm)2(H2O)2][Ni(bpm)2(N3)2]}(ClO4)2 (2), where bpm refers to bis(pyrazol-1-yl)methane, have been prepared and characterized by elemental analyses, IR, UV-Vis spectra and X-ray diffraction. Crystal data for 1: monoclinic, space group P21/n with a = 10.394(4), b =14.410(5), c = 12.591(4) Alfa,Beta = 91.194(7)°, V =1885.6(11) Alfa3 and Z= 4. Crystal data for 2: triclinic, space group P1with a = 8.7673(6), b = 8.9618(6), c = 13.5653(9) Alfa, alfa = 84.6040(10) , beta= 84.4230(10) , _ = 79.6040(10), V = 1040.19(12) Alfa3 and Z = 1. Complex 1 is a neutral monomer molecule, in which CoII ion is coordinated by four nitrogen atoms from two chelating bpm and two terminal azide ligands to form a cis-octahedral configuration. However, compound 2 is composed of a neutral [Ni(bpm)2(N3)2] entity, one [Ni(bpm)2(H2O)2]2+ cation and perchlorate anions, in which the neutral Ni(bpm)2(N3)2 entity is in a trans-six-coordinated configuration. The uncoordinated terminal nitrogen atom of azide forms O-H.....N hydrogen bonds with the coordinated H2O molecule to afford a one-dimensional chain structure.

Investigation of influence of microwave energy on cleavage of S-S and C-S bonds by azide ions

Kurzawa J., Stachowiak S.

Chemia Analityczna

2001

Vol. 46, No. 6

907-910

The influence of microwave energy on the rate of cleavage of-C-S- and -S-S- bonds by azide ions was investigated. It was found that microwaves do not accelerate the split of -C-S- bond, whereas the cleavage of-S-S- bond takes place faster but the reproducibility of this reaction is very poor and microwave technique is not recommended for quantitative determination.

Badano wpływ energii mikrofalowej na szybkość rozszczepienia wiązania -C-S-i -S-S- przez jony azydkowe. Stwierdzono, że mikrofale nie przyspieszają zerwania wiązania -C-S-, natomiast rozszczepienie wiązania -S-S- zachodzi szybciej, jednak niepowtarzalność procesu wyklucza możliwość stosowania tej techniki w analizie ilościowej.