Synthesis and characterisation of mono- and dinuclear diethyldithiocarbamatonickel(II) organochalcogenide complexes |
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| Affiliation: | 1. Department of Chemistry, University of the Western Cape, Private Bag X17, Bellville, 7535, South Africa;2. Research Institute, King Fahd University of Petroleum and Minerals, KFUPM, Box 1472, Dhahran 31261, Saudi Arabia;1. University of Padua. Dipartimento di Ingegneria Civile, Edile e Ambientale, 35122 Padua, Italy;2. Earth System Physics, Abdus Salam International Centre for Theoretical Physics, 34151 Trieste, Italy;3. Sergio Arboleda University. School of Exact Sciences and Engineering-ECEI. Environmental Engineering, 111071 Bogotá, Colombia;4. Sergio Arboleda University, Instituto de Estudios y Servicios Ambientales-IDEASA, 111071 Bogotá, Colombia;5. Sergio Arboleda University. School of Exact Sciences and Engineering-ECEI. Mathematics, 111071 Bogotá, Colombia;6. Externado University of Colombia. Research Center in Philosophy and Law, 111711 Bogotá, Colombia;1. European Commission, Joint Research Centre (JRC), Institute for the Protection and Security of the Citizen (IPSC), Maritime Affairs Unit, E. Fermi 2749, 21027 Ispra (VA), Italy;1. University of Florence, Department of Chemistry “Ugo Schiff”, Via della Lastruccia 3-13, I-50019 Sesto Fiorentino (Florence), Italy;2. University of Florence, Department of Health Sciences - Section of Clinical Pharmacology and Oncology, Viale Pieraccini 6, 50139 Firenze, Italy;3. University of Florence, Department of Neurosciences, Psychology, Drug Research and Child’s Health - Section of Pharmaceutical and Nutraceutical Sciences, via Ugo Schiff 6, 50019 Sesto Fiorentino (FI), Italy;4. University of Florence, Department of Neurosciences, Psychology, Drug Research and Child’s Health - Section of Pharmacology, Viale Pieraccini 6, 50139 Firenze, Italy;1. Department of Paediatric Respiratory Medicine, Inselspital, University Children''s Hospital of Bern, University of Bern, 3010 Bern, Switzerland |
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| Abstract: | The reaction of Ni(dtc)(PR3)Cl (dtc=diethyldithiocarbamate, R=Ph or Bu) with HSC6H4Cl-4 or HSCH2C6H4Cl-4 and Et3N gave two types of complex. For PPh3, the products were [Ni(dtc)(μ-SC6H4Cl-4)]2 (1) and [Ni(dtc)(μ-SCH2C6H4Cl-4)]2 (2); whilst PBu3 gave Ni(dtc)(PBu3)(SC6H4Cl-4) (3). The structure of freshly prepared 3 was determined to be monomeric, as indicated by X-ray diffraction studies. However, at room temperature in solution, 3 was observed to slowly convert to 1. Structural identification of 1 and 2 and similar dimers, and structural identification of 3 and analogous monomers, were investigated by mass spectrometry. Electron impact mass spectrometry (EIMS) failed to confirm the proposed structures due to extensive decomposition in the mass spectrometer. In the electron impact (EI) mode, all complexes invariably decomposed to Ni(dtc)2; on the other hand, fast atom bombardment (FAB) ionisation gave the expected molecular ions for all compounds. |
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