English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Urea reacts with PtCl 2 , H 2 [PtCl 6 -6H 2 O, H 2 [IrCl 6 ] and Ni(CH 3 CO 2 ) 2 in aqueous solution at high temperature (60-80 °C) yielding [PtCl 2 (Urea)]·2H 2 Ο (1), (ΝH 4 ) 2 [PtCl 6 ] (2), (NH 4 ) 2 [IrCl 6 ]·H 2 O (3) and [Ni 2 (OH) 2 (NCO) 2 (H 2 O) 2 ] (4) complexes, respectively. In complex 1, urea coordinates to Pt(II)as a neutral bidentate ligand via amido nitrogen atoms. In complexes 2, 3 and 4 it seems that the coordinated urea molecules decompose during the reaction at high temperature and a variety of reaction products are obtained. All complexes were isolated in moderate yields as dark green (1), yellow (2), pale brown (3) and faint green (4) precipitates, respectively. The reaction products were characterized by their microanalysis, IR, 1 H and 13 C NMR spectra as well as thermal analysis. General mechanisms describing the formation of these complexes were suggested.

Synthesis and Spectroscopic Studies of Metal Complexes Formed in the Reaction of Metal Ions with Urea at High Temperature