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A Q / e C > < r cc li > ^ci^ ^cK> <^ x Thus with a coordination number of 4, each Be atom achieves a noble gas configuration. On the whole, beryllium resembles aluminum more than it does magnesium (diagonal relationship in the Periodic system (see)). 50) (700) (1140) pounds) are important in organic and organometallic syntheses. As expected, the reactivity of the A. increases with increasing atomic mass. Although calcium, strontium and barium react vigorously with water to form the hydroxides and evolve hydrogen, magnesium is attacked only by hot water, and the reaction is slow.

The acetaldehyde which normally acts as hydrogen acceptor is trapped by the hydrogensulfite, and the reducing equivalents of N A D H + H + are transferred to dihydroxyacetone phosphate. The resulting glycerol phosphate is then dephosphorylated to glycerol. "Neuberg's third type of fermentation" occurs when an alkali added to the fermentation causes a Canizzaro reaction to take place, converting acetaldehyde to ethanol and acetic acid; dihydroxyacetone phosphate acts as the hydrogen acceptor and leads to production of glycerol.

The most important is Lithium alanate (see), which is widely used as a reducing agent. Other elements in Groups la to Ilia also form A. Alane: same as aluminum hydride. Alanine, ammopropionic acid, abb. Ala: 1) ciAlanine, CH 3 -CH(NH 2 )-COOH is a proteogenic Amino acid (see). It is one of the main components of silk fibroin. The chemical synthesis according to Strecker and Bucherer gives an 88% yield of DL-A. , is converted to L-A. by hydrolysis catalysed by immobilized acylase. A biotechnological pathway to L-A.