We are nearing the close of a century that witnessed unprecedented scientific and technological progress that was probably unimaginable even half a century ago. While the overall advancement of science and technology is phenomenal, in reality it has taken place over several generations, made possible by the untiring dedication of the scientists involved to their research. In fact, every decade achieved significant advances, permitting the next generation to move forward in their own pursuit of knowledge. Later developments might cause some of the work of the earlier workers to appear trivial. However, one can only admire the tenacity of the pioneers whose steadfastness has led us to where we are today.In chemistry, the invention and perfection of new sophisticated instruments and methodologies have facilitated the analysis of reaction intermediates and products. Newer industries catering to the needs of chemists have decreased the necessity of having to prepare many of the starting materials and reagents.