TETRASTYLE (Gr. ehpa-, four, and

See also:

• ARI

ari)aos, a

See also:

• COLUMN (Lat. columna)

column)  , the term in architecture given to a portico of four columns which forms the main front of a temple (q.v.) . N: C . Billow (Ber., 1906, 39, pp . 2618, 4106), however, showed this substance to be an N-ammotriazole, which necessitates the first decomposition product being an acid (I.), the conversion into the (I.) H02C•C•NH•NH H02C•C—N•NH2 N•N: C•CO2H (II') N :NC CO2H triazole derivative (II.) being due to the ring opening on the addition of the elements of water and then closing again to the five-membered ring with elimination of water again . The decompositions of diazoacetic ester were then again examined by T . Curtius and his students (Ber., 1907, 40, pp . 262, 350, 450, &c.), who showed that both triazole and tetrazine derivatives could be obtained from the bisdiazo-acetic acid which is formed by the action of alkali on diazo-acetic ester .