This volume presents more than 200 checked procedures, bringing the total number of procedures covered by the series to over 3,000. The syntheses appear in 68 numbered sections, grouped into nine chapters that correspond to current areas of research. Noteworthy is the inclusion of syntheses of the early transition-metals polyoxoanions, a class of compounds notably difficult to prepare in pure form. The compounds synthesized are useful, not only to inorganic chemists, but to organic, polymer and solid state chemists, biochemists and materials scientists.