Oxidation can also be effected using conventional stoichiometric chromate or permanganate reagents. In stoichiometric compounds, the molar proportions are whole numbers. Incomplete combustion usually results from insufficient oxygen to achieve the perfect stoichiometric ratio. Both stoichiometric and catalytic variants were initially examined with zirconocene bis(amido) complexes. Propargyl methanesulfinates are useful substrates for the synthesis of allenes from stoichiometric organocopper complexes. The alkalinity is equal to the stoichiometric sum of the bases in solution. The system of stoichiometric equations of elementary reactions is the "reaction mechanism". This is the product of the stoichiometric matrix and the vector of reaction rate functions. This reaction provides for precise stoichiometric control of the materials. The data were obtained by stoichiometric calculations. Only a few specific stoichiometric reactions have been characterised. It is negative on the linear span of the stoichiometric vectors formula 69. This stoichiometric reaction was discovered in 1894.