In this research we successfully showed utility of imidazolium fluoride [(LDipp)H][F] that served as an efficient donor of fluoride ion. The mentioned reagent, prepared in 2016 by our group, reacts with germanium and silicon tetrafluorides (GeF4 in SiF4) and forms discrete trigonal-bipyramidal SiF5− in GeF5− anions. Such geometry of anions is relatively rare compared to the octahedral geometry of anions. Using X-ray structural analysis on a single crystal, we achieved the first structural determination of a discrete trigonal bipyramidal structure of GeF5- anion to date. We also published the first 19F NMR spectrum GeF5- in GeF62- anions in organic solvents, in acetonitrile. We completed the work by comparing the stability of the trigonal bipyramidal to octahedral species together with the interpretation of the disorder in the crystal structure as a result of the rigid rotation or the Barry pseudorotation mechanisms of the prepared anions.
COBISS.SI-ID: 30693927
Study of AgF2 · 2WOF5 compound showed that its crystal structure consists of layers built of Ag2+ cations bridged by [WOF5]– anions and not, as previously assumed, from the infinite [AgII–F]+∞ chains and [W2O2F9]– anions (correct is Ag(WOF5)2 and not AgF(W2O2F9)). The magnetic moments of Ag2+ from the same layer are almost perfectly antiferromagnetic aligned. Weak ferromagnetic inter-layer interactions are also present.
COBISS.SI-ID: 30102567
The Ag2+ cation is among the strongest one-electron oxidizers that is capable of oxidizing O2 and Xe the superacidic environment. Because of its reactivity it is not stable in aqueous environment. AgSO4 is a unique example of Ag(II) compound containing F-free anion. Surprisingly, the action of atmospheric moisture on shiny black crystals of AgSO4 generates black powder, which corresponds to AgSO4 H2O. Contribution "[Ag(OH2)2][Ag(SO4)2]: the first hydrate of an Ag(II) salt", where one of the authors is member of research group (Z. Mazej), was published 2017 in Chemistry - A European Journal. Contribution was highlighted on the inner cover page of one of the issues. A detailed combined experimental and theoretical study of this phase was given in that contribution.
COBISS.SI-ID: 30243623
The purpose of this research was to explain the reactivity of N-heterocyclic carbene (NHC) with antimony(III) fluoride. We managed to explain reaction mechanism and explained the behaviour of this system, both in solution and in solid state. Reaction shows the amphoteric nature of SbF3 (both as a donor and acceptor of fluoride anion) which reflects in the structural determination of auto-ionization product, [(LDipp)2SbF2]+[SbF4]−. Such a product represents a) first example of mesoionic carbene coordinated to any metal/metalloid fluoride substrate, b) first example of carbon-based ligand coordinated to SbF2 moiety, c)first example of the reaction mechanism where NHC ligand facilitates the auto-ionization reaction, d) rare example of SbF3 auto-ionization that shows amphoteric nature of SbF3.
COBISS.SI-ID: 30283559
The original scientific article "Safety change management - a new method for integrated management of organizational and technical changes" (Gerbec Marko, Safety science, 2017) was published in a recognized scientific journal. The article describes the concept, use and testing of the new method for the assessment and management of the complex technical and organizational changes in the industrial establishments related to the aspect of process safety (major accident hazards). That method the author directly implemented in the management system in large industrial organization in Europe in 2017, within the consortium of the consulting organizations, technically led by the JSI.
COBISS.SI-ID: 29641767