Core molecular orbital method is Hartree - namesake equation Roothaan equations isobutanol, referred HFR equation, which is based on the three made outstanding contributions to the molecular orbital method in the process of human development - Fokker. 1928 DR Hartree proposed a system of n electrons in each electron is seen in the average potential field provided by the remaining n -1 electrons in motion assumptions. Thus for each of the electronic systems have been a single-electron equation (quantum mechanical equations represents the state of motion of electrons), called Hartley equation. Using a self-consistent field iteratively solving this equation (see the self-consistent field molecular orbital method), you can get the electronic structure and properties of the system. Hartree equation is not considered due to the Pauli principle and the need to comply with the electron spin. 1930, BA Fork and JC Slater are proposed to consider the Pauli principle of self-consistent field iterative equation, called the Hartree - Fock equations same reaction, different variations of heat under different conditions. If you do not specify the reaction conditions and talk about how many calories is pointless. Meanwhile isobutanol purposes, the reaction in order to compare different chemical reaction heat isobutanol offer, the reaction must be carried out under the same predetermined conditions. To this end, the provisions of the reaction heat under the pressure of 101 kPa and 25 ℃ standard reaction conditions for factory direct hot isobutanol in order to facilitate comparisons. Different state changing process, the reaction heat can be divided into isobaric heat of reaction, the reaction heat isovolumetric; between different types of chemical changes, the reaction heat can be divided to generate heat, heat of combustion, heat of neutralization and the like. Henan iso-butanol, isobutanol market, Xiang dry chemical (certified merchants) by Andrew dry Jinan Chemical Limited. Jinan Cheung Dry Chemical Co. (www.xiangqianhuagong.com) (www.dilunyierchun.com) is specialized in the "glycol" enterprise, the company of "honesty, hard service" concept, to provide you with the most quality products and services. Welcome to inquire! Contact: Mr. You can also access (www.dilunyierchun.com/supply_details_41829770.html), for more information about the company.