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在络合物Fe_2(CO)_9中存在多种化学键,本文试从理论上剖析此分子内原子间,原子与基团间成键的因素、过程及类型。 一、中心原子Fe的成键特征: 1、每个铁原子总价数为6.04。 Fe原于序数26,一般Ar壳外的8个电子3d~64S~2参与成键,如果金属键,那么晶粒内原子的电子参加一种特殊的离域共价键,离域电子的活动范围是沿三维空间伸展;如果全部成键且键的形式是共享电子对,那么电子自旋配对,故对金属的磁矩没贡献,但当铁受饱和磁化时,每个铁原子的磁矩为2.22Bohr磁子,这就表明每个原子能多于5.78个电子被包含在所形成的电子对中,还有另一种可能性,就是在原子之间成键的电子也存在着未配对的
There are many chemical bonds in the complex Fe2 (CO) _9. This paper attempts to theoretically analyze the factors, processes and types of bonding between atoms and atoms in the molecule. First, the central atomic Fe bonding characteristics: 1, the total number of each iron atom 6.04. The original number of Fe is from the ordinal number 26, and the eight electrons outside the Ar outer shell are involved in the formation of bonds from 3d to 64S ~ 2. If the metal bonds, the electrons in the intragranular atoms participate in a special delocalized covalent bond. The range extends in three dimensions; if all bonds are formed and the bond is in the form of a shared electron pair, the electron spin pairs and therefore does not contribute to the magnetic moment of the metal, but when the iron is saturated magnetized, the magnetic moment of each iron atom Is 2.22 Bohr magnets, which means that more than 5.78 electrons per atom are contained in the formed electron pair, and another possibility is that the electrons that bond between atoms also have unpaired