Metallo-organic compounds, reaction with

Chemical Reactivity - Reactivity with Water No reaction Reactivity with Common Materials May attack some forms of plastics Stability During Transport Stable Neutralizing Agents for Acids and Caustics Not pertinent,- Polymerization Hazardous polymerization unlikely to occur except when in contact with alkali metals or metallo-organic compounds Inhibitor of Polymerization 10 -20 ppm tert-butylcatechol. 

In view of these preconditions, it was obvious to use anionic initiators. With the lithium alkyls used by Wei—for example, butyllithium or other organic alkali compounds—only insoluble thermoplastic products are obtained, even at — 80 °C in both THF and toluene because these initiators are too reactive. The reactions that take place include attack by the metallo-organic compound and the already metallized cyanoprene (or the metallized polymer) on the nitrile groups of both monomer and polymer. 

Reaction 1 is also obtained in a high frequency plasma (13.56 MHz) at 150 Pa pressure and at a low deposition temperature of 500°C. l The availability of two metallo-organic titanium compounds, tetrakis-diethylamino titanium (TDEAT) and tetrakis-dimethylamino titanium (TDMAT) makes possible the deposition of TiN at lower tempera-ture with the following reactions (both at 320°C) ... 

OveraU, the metallo-enzymes are excellent catalysts for reactions of especially small inert small molecules for which the organic side chains of proteins cannot be used (e.g., for Hg, CH4, N2, O2, and CO). These proteins are the basic starting compounds of biological synthesis. Hence, metallo-enzymes have always been the basic catalysts of organisms. In fact, they have increased in significance with evolution. 

As indicated in Scheme 1, Pd-catalyzed conjugate substitution can be achieved by the reaction of /3-metallo-a,/3-unsaturated carbonyl compounds with organic electrophiles. 

---