Seeking foreign literature on organic synthesis and its translation 80

P-C6H4[Si(CH3)3]2, MF: C12H22SI2, CAS [13183-70-5], MW = , BP = 194 1950C, MP = 92 940C.

The process of synthesizing organic matter from a simple compound or element. It also sometimes involves the process of degradation from complex feedstocks to simpler compounds. Due to the various characteristics of organic compounds, especially the covalent bond between carbon and carbon, organic synthesis is more difficult, and it is often necessary to use reaction conditions such as heating, light, catalyst, organic solvent and even pressure.

1828 fWühler synthesized the animal metabolite urea from the inorganic ammonium cyanate, a few years later hKolbe synthesized acetic acid, and since then organic synthetic chemistry has developed rapidly.

Organic synthesis is broadly divided into two aspects: Basic organic synthesis. Including the synthesis of important chemical industry raw materials from raw materials such as coal, oil, water and air, such as raw materials for synthetic fibers, plastics and synthetic rubber, solvents, plasticizers, gasoline, etc., the output of which is almost close to the order of steel order.

Fine organic synthesis. This includes the synthesis of compounds with more complex molecules from simpler raw materials, such as chemical reagents, pharmaceuticals, pesticides, dyes, fragrances, and detergents. After the 70s of the 20th century, the new field of organic synthesis has developed rapidly, such as the synthesis of some natural complex molecules with certain stereo conformation, some new theories and methods such as reaction mechanism, conformational analysis, photochemistry, and the application of various physical methods and analysis methods, especially the proposal of the principle of symmetry conservation of molecular orbitals, which plays a great role in promoting organic synthetic chemistry.

The properties of the various graphite materials have always fascinated both scientists and technicians. In this age, PX, which hybridized covalently sp2 in each carbon orbital py to form a firm bond, gave rise to an angle of 120 c-c-c° and familiar bonds resembled a wire mesh layer. The remaining pz orbitals form a group of filled orbitals with its three neighboring carbons at each carbon, called valence bands, and a group of empty* orbital carriageways, called conduction bands.

Although three or four valence electrons are formed in each (single) bond, the fourth electron.

One-third of the form of bonds produced by neighboring countries in the form of one-third of the carbon bonds in graphite. Without chemical bonds in the c-direction, Saturn interactions are extremely fragile. This includes the propagation of the electric charge and heat carriers that cause light acres to quietly learn electricity and thermal conductivity, both more than 103 times below their planes.

Nucleoside analogues.

The anisotropy of Shifan's material properties continues to fascinate scientists and technologists. , px, py each carbon atom orbital hybridize, forming a strong covalent sp2 bond, thus the clay rises to a 120° ccc-certified bond angle and the familiar chicken filament-like layer. Every three adjacent carbon-carbons on the remaining pz orbitals overlap to form a band called a valence band-filled orbital, and an empty * orbital, called a conduction band.

While each carbon ** has four valence electrons on (single) bonds, the fourth electron.

A bond with one of each neighbor and one-third of the graphite produced in the carbon-carbon bond order, with one-third of the form. There is no chemical bond in the C direction, and the interaction with the plane is extremely weak. This includes the propagation of the charge and the heat carrier, resulting in both electrical and thermal conductivity in the plane being more than 103 times higher than it is in the plane.

analogues.