42401-87-6Relevant academic research and scientific papers
Synthesis, crystal structures and properties of quasi-one-dimensional platinum compounds
Bremi, Juliane,Gramlich, Volker,Caseri, Walter,Smith, Paul
, p. 23 - 31 (2001)
Quasi-one-dimensional complexes of the type [Pt(NH2R)4][Pt(mnt)2], where mnt designates maleodinitriledithiolate and R an ethyl (Et) or octyl (Oc) group, were synthesized and characterized. Single-crystal X-ray diffraction revealed that both compounds crystallized in the triclinic space group P1. The platinum atoms were arranged in linear arrays in both compounds; while the Pt-Pt distances were equal in [Pt(NH2Et)4][Pt(mnt)2] (3.96 ?), surprisingly, two different intermetallic spacings (3.86 and 4.01 ?) were observed in [Pt(NH2Oc)4][Pt(mnt)2]. The Pt-Pt distances in the [Pt(NH2R)4][Pt(mnt)2] compounds are large compared to those in the typical Magnus-salt-type complexes (3.15-3.62 ?). An uncommon, reversible solid-state phase transition was detected for [Pt(NH2Oc)4][Pt(mnt)2] at 70°C, which might be related to a change in the packing of the octyl chains. The platinum stacks decayed when in solution, yielding predominantly ion pairs. The UV-Vis absorption spectra of such solutions were dominated by characteristics associated with [Pt(mnt)2]2- units, and UV emission maxima were found at 345 and 363 nm upon excitation with light of wavelengths between 250 and 340 nm.
