Thallium halo complex

Concerning the determination of surfactants, in 1997 Vytras s group demrai-strated that carbon paste-based electrodes could also be used as potentiometric sensors to monitor titrations of surfactants.When compared to PVC and CW electrodes, CPEs had the advantages of very low Ohmic resistance, very short response time in addition to the ease of fabrication and regeneration as well as long functional lifetime. Jezkova et al. used perchlorate and fluoroborate ion-selective carbon paste electrodes for both direct potentiometric measurements and potentiometric titration of perchlorate or fluoroborate with 0.1 M CPC. The electrodes had a rapid response, low Ohmic resistance, and limits of detections and selectivity similar to the limits of commercial membrane electrodes. A carbon paste electrode incorporated with the ion association of CPC-thallium halo complexes was applied as indicator electrode with the potentiometric titration of surfactants. ... 

The technique of performing halide abstraction via interaction of a metal halo complex with a silverd), thallium(I), or nitrosonium salt (see ref. 142, for discussion) has proved useful in the isolation of many novel sulfoxide complexes. Thus, [Pd(S-Me2S0)2(0-Me2S0)2]-... 

Another approach to the synthesis of phosphirenes by formation of two P-C bonds involves the electrophilic addition of halo- and dihalophosphine-AlCls complexes with alkynes, yielding phosphirenium salts. In some cases, the use of thallium(l) triflate instead of AICI3 improves the method <1997JOM(529)189>. In the normal case, the chlorophosphirenium salts are not isolated but rather immediately reduced with tributylphosphine to furnish the phosphirenes (Scheme 12) <19960M1597>. 

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