Projects / Programmes
Superkisline, obetavni reakcijski mediji v kemiji visokih oksidacijskih stanj (Slovene)
| Code |
Science |
Field |
Subfield |
| 1.04.03 |
Natural sciences and mathematics |
Chemistry |
Inorganic chemistry |
| Code |
Science |
Field |
| P360 |
Natural sciences and mathematics |
Inorganic chemistry |
superacids, hydrogen fluoride, fluorides of transition elements, xenon fluorides, krypton difluoride
Researchers (14)
Organisations (1)
| no. |
Code |
Research organisation |
City |
Registration number |
No. of publicationsNo. of publications |
| 1. |
0106 |
Jožef Stefan Institute |
Ljubljana |
5051606000 |
90,753 |
Abstract
The course of the reactions of transition metals or their compounds in anhydrous hydrogen fluoride (aHF), depending on the acidity or basicity of the solvent, was investigated. The chemistry of palladium in aHF acidified by AsF5 and in the presence of fluorine was studied. The obtained product was Pd(AsF6)2. It reacted further with excessive fluorine yielding Pd2F6. Pd(AsF6)2 solvolizes in the neutral aHF to the high pressure modification of PdF2. The compound Pd(AsF6)2 is isostructural with known compounds of the type M(II)(M(V)F6)2. Magnetic measurements show that Pd(AsF6)2 obeys Curie-Weiss law in a long temperature range and that there are no strong interactions between Pd(II) atoms. CuFAsF6 was prepared by the reaction between Cu and KrF2 in aHF acidified by AsF5. The structure of CuFAsF6 consists of (CuF)n chains which are connected by AsF6 octahedra. The interatomic distance Cu-Cu is one of the shortest distances metal-metal what causes strong antiferromagnetic interactions between Cu atoms in the chain.
In the field of the noble gas chemistry the compounds XeF2.2CrF4, XeF5.CrF5, XeF2.VF5 and Xe2F11VF6 were isolated and their structures were determined. The structure of VF5 was reinvestigated. It was found that VF5 has a phase transition at 183 K. The structures of both modifications were determined.
The series of the compounds of the type LnFx(AsF6)3-x (Ln = lanthanoide metal) was prepared. The compounds are amorphous and are loosing AsF5. It is possible to stabilize them by additional ligands e.g. XeF2. The compound ŠLa(XeF2)2,5Ć(AsF6)3 was obtained. It has nine fluorine ligands around lanthanum atom.
