Structure and characterisation of [Pt(Me2pipdt)2][Pt(mnt)2]2 and its unusual magnetic properties associated with a non-regular one-dimensional [Pt(mnt)2] stack

Autor: Samuele Sanna, Paola Deplano, Francesco Congiu, Maria Laura Mercuri, Giorgio Concas, Angela Serpe, Luca Pilia, Francesco Bigoli, Luciano Marchiò
Rok vydání: 2006
Předmět:
Zdroj: Chemical Physics Letters. 421:361-366
ISSN: 0009-2614
DOI: 10.1016/j.cplett.2006.01.097
Popis: For electro-oxidation of [Pt(Me 2 pipdt) 2 ][Pt(mnt) 2 ] (Me 2 pipdt N , N ′-dimethyl-piperazine-2,3-dithione; mnt = maleonitrile-2,3-dithiolate) ( 1a ) the novel salt [Pt(Me 2 pipdt) 2 ][Pt(mnt) 2 ] 2 ( 2a ) has been prepared and characterised. 2a exhibits segregated chains of anionic and cationic complexes. The anions generate a non-regular stack with the separation between the planes of 3.558(5) A [3.60(1) A is the Pt⋯C C (mid point) separation] and 3.643(5) A [3.980(3) A is the separation between Pt and S-atoms]. The cations are perpendicular to the anions and interposed between those stacks in a ribbon fashion. Magnetic measurements show the presence of a magnetic transition between the behaviour of an antiferromagnetic alternating-exchange chain and the behaviour of a set of antiferromagnetic dimers.
Databáze: OpenAIRE
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