SVIBOR - Project code: 1-07-226

MINISTRY OF SCIENCE AND TECHNOLOGY

Strossmayerov trg 4, HR - 10000 ZAGREB
tel.: +385 1 459 44 44, fax: +385 1 459 44 69
E-mail: ured@znanost.hr

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Project code: 1-07-226


INVESTIGATION OF SILYLENIUM AND NITRENIUM CATIONS BY MATRIX ISOLATION METHOD


Main researcher: VANČIK, HRVOJ (91661)



Assistants
Type of research: basic
Duration from: 01/01/91. to 12/31/94.

Papers on project (total): 14
Papers on project quoted in Current Contents: 8
Institution name: Prirodoslovno-matematički fakultet, Prirodoslovni odjeli, Zagreb (119)
Department/Institute: Chemistry department
Address: Strossmayerov trg 14, 41000 Zagreb
Communication
Fax: 385 41 432 526
E-mail: vancik@olimp.irb.hr
Phone: 385 41 432 580
E-mail: vancik@mvsrce.srce.hr

Summary: Up to now silylenium and nitrenium cations have been studied only indirectly by means of product analysis and kinetic measurements. The attempts to prepare them in supreacidic media in liquid phase also failed. In these investigations we will apply our method for matrix isolation to study the carbocations having silicon and nitrogen atoms in close vicinity of the positively charged carbon. We hope, that under these experimental conditions the silicon substituted vinyl, allyl and propargyl cations can be isolated and studied by IR spectroscopy.

Keywords: carbocations, silylenium cations, nitrenium cations, nitriles, matrix isolation, superacids, antimony pentaflouride, vinyl cations, propargyl cations, allyl cations, chlorosubstituted cations

Research goals: 1. To investigate the stability of silylenium and nitrenium cations and similar intermediates in super acidic medium. 2. To work out the most convenient method for their isolation 3. To investigate their activity by measuring (spectroscopically) the electronic effects responsible for chemical behaviour. 4. To determine vibrational structures of these cations and/or similar species. 5. To study the relationship between vibrational structure and chemical reactivity in cases when these ions and similar species are perturbed by strong chemical agens.

Other information about the project.
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Last update: 10/13/95
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