ACETYLENE

n. A”s-e”t'i71-en, For deriv., see ACETYL and -ene.* Fr., acétyléne. Ger., Acetylen, Aethin. It., acetilene. acetileno. ‘Syn.: ethine. À gaseous hydrocarbon, C,H, = C! CH, and so having the same relation to the acetyl of the older writers (C,H,) that ethylene and methylene have to ethyl and methyl; a col lorle , inflammable gas, of very disagreeable odor, which can be repared by the direct synthesis of its elements in the electric arc. i 4.) It has various peo eee modifications, which are derived rom it by the action of heat, such as: diacetyl ene, C,H,; tri acetylene, or benzene, CaH,; tetra cetyl ene, Cara or cinnamene, CgHg; pent acetylene, or naphthalene hydride, C, H,; and enneacetylene, or retene, CisHig. |B, 2.—A. bromides. “These include the diz bromide, the tetra bromide, and the hydro bromide, C,H,. HBr (all of which are addition products); and one substitution product, bromacetylene, C,HBr, with its ‘dibromide, C,HBr.Br,. [B, 2.J—A. bromiodide. See A. iodides.—A. chlorides. ‘These are the dichloride, C,Hz.Cl,; the chlorinated dichloride, C,HCI1.Cl,; and the tetrachloride, Cally.Cly. [B, 21—A. dibromide, Fr., dsbromure d'acétylène. Ger., Acetylendibromiir, A liquid having the constitution CHBr— CHBr = C,H,Br,. [B, 4.|—A. dichloride. Fr., dichlorure d'acétylène. Ger., Acetyl end ich lorür. A colorle liquid, CHCI= CHCI= C. rac, isomeric, and apparently identical, with A2s-e2t-i2Va2m-itn, From acetyl and Ger., Acetyl am in. See 2. Zn dich lor ethylene. i; 4.]—A, dihydriodide. See A. iodides.—A. diiodide. Fr., diiodure Ghee leek Ger., Acetylendiiodür. A crystalline solid, CHI CHI = C,Hal4. [B, 4.|—A. lodides. They include the diiodide; the monohydrio ide, C,H2,.H1: and the dihydriodide, C,H9 HD (addition products); and the following substitution products: 704 acetylene, C,HI; diiodoacetylene, C,Hala, the tetra iodide, CyHyl, = CoHy.Cal,, or (C,Hala)Iq; and the brontiodide, C,BrgIs =(C Brat IBr. formed from’ the tefraiodide by substituting # atoms of bromine for 2 of hydrogen, and 1 of bromine for lof iodine. [B.]|—A.-hzemoglobin. See under HÆMoGLOBIN.—A. hydro bromide. See A. bromides —A. monohydriodide. See A. iodides.—A. series. See ALKYL I DENE series.—A. tetra bromide. Fr., tétrabromure d’acétyléne. Ger., Acetylentetrabronuir. A liguid having the constitution CHBr — CHBr, = C,H,Br,. [B, 4.) —A. tetrachloride. Fr., tétrachlorure d’acétulène. Ger., Acetylentetrachlorii: A colorle liquië, CHCl, — CHC], = C,H,0),, isomeric, and apparently identical, with dich lor ethylene dichloride. fB 4]—A. tetra iodide. Fr., tétraiodure d’acêtylène. Ger., Acetylentetraiodiir, See A, iodides—Chlorinated a. dichloride. See A. chlorides.