一、什么是元素有机化合物: 有机化合物可以分为普通有机化合物和元素有机化合物两大类。我们知道,有机化合物主要是由碳、氢、氧、氮,其次是硫和氯,有些则含有溴和碘所组成的。但是,在现代化学的发展过程中,由于人们对天然物质的深入了解以及合成方法的研究,发现了许多有机化合物中(天然的或合成的)不仅含有上述八种元素,而且还有其它的元素存在。例如在植物叶绿素里含有镁,维生素B-(12)。里含有钴。为了与我们已熟知的有机化合物有所区别,我们将含有其它元素的有机化合物特称为元素有机化合物。这里所谓的其它元素是指包含有周期表中的金属和非金属元素,而且碳原子和它们以不同的形式直接或间接地相联结。一个元素有机化合物至少含有一个其它元素直接与碳原子相连,这就是狭义的元素有机化合物的定义,平常所说的元素有机化合物大都是指此。由于直接连上的其它元素原子对所连有机基团的影响大,因此这样下定义是比较恰当的。另一方面,一些只含有其它无素间接(通过O,或N原子)连于碳上的元 First, what is the element of organic compounds: Organic compounds can be divided into ordinary organic compounds and organic compounds two main categories. We know that organic compounds are mainly composed of carbon, hydrogen, oxygen, nitrogen, followed by sulfur and chlorine, while others contain bromine and iodine. However, in the development of modern chemistry, due to the deep understanding of natural materials and the study of synthetic methods, many organic compounds (natural or synthetic) have been found to contain not only the above eight elements but also other elements exist. For example, plant chlorophyll contains magnesium, vitamin B- (12). Contains cobalt. In order to be different from the organic compounds we already know, we refer to organic compounds containing other elements as elemental organic compounds. The other elements referred to herein mean metal and non-metal elements included in the periodic table, and the carbon atoms are bonded directly or indirectly to them in different forms. An elemental organic compound contains at least one other element directly connected to a carbon atom. This is the definition of a narrow elemental organic compound, which is usually referred to as elemental organic compound. Since the other directly connected to the elemental atoms on the attached organic groups, so the definition is more appropriate. On the other hand, some elements that contain only other elements that are indirectly (via O, or N atoms) carbon atoms