By Robert C. West, Anthony F. Hill, Mark J. Fink

Just about all branches of chemistry and fabric technology now interface with organometallic chemistry - the learn of compounds containing carbon-metal bonds. This greatly acclaimed serial includes authoritative stories that handle all features of organometallic chemistry, a box which has increased greatly because the e-book of quantity 1 in 1964.

  • Provides an authoritative, definitive assessment addressing all elements of organometallic chemistry
  • Useful to researchers inside of this lively box and a needs to for each glossy library of chemistry
  • High-quality learn publication inside of this speedily constructing field

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Example text

Excellent, more in-depth coverage of mechanistic work up to ca. D. 201 The key steps of this cycle are: (1) oxidative addition of Si–H to the metal center, (2) coordination of the olefin or other unsaturated species to the metal, (3) insertion of this usually-Z2-coordinated molecule into the M–H bond and finally, (4) reductive elimination of the Si–C pair to regenerate the catalytically active metal center. This fundamentally sound model of the catalytic cycle continues to be widely accepted, but its simplistic picture cannot explain some common observations and the formation of certain products in hydrosilations catalyzed by several transition metals other than platinum.

High b(E)-selectivity for the hydrosilation is reported. Preliminary UV–visible spectroscopic studies of some of the bis-silyl and the tris-silyl fluorophores are also presented. 158 Either Karstedt’s complex or RhI(PPh3)3 was used as catalyst. Varying levels of regioand stereochemical distribution of the repeat units were obtained (Rh provided mostly b-(Z) product), and the polymers were generally of relatively low molecular weight. Cyclic voltammetry studies showed single redox waves that are suggestive of no through-chain interaction between neighboring ferrocene units.

ROY Ph Ph CH2 =CH Si OMen Np excess KOH 60 °C, 5 h, toluene CH2 = CH Ph Si Np O OK Np ClMe2SiH CH2 =CH Si Si H 0 °C, xylene Karstedt's Pt 80 °C (36) Ph CH2-CH2 Si Np O Si n X MECHANISTIC STUDIES For a reaction that has been widely practiced for over a half century, development of a clear understanding of the catalytic cycle that is the engine behind its scientific and commercial utility has been difficult and slow. This has not been due to lack of insight or effort, but simply because characterization and isolation of the extremely reactive and fleeting catalytic intermediates, with the highly efficient catalytic metals, have evaded numerous attempts and foiled strategies.

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