1.203A H—C≡CxH 1.061 180° 2. Nomenclature (1)看成乙炔的衍生物( derivative CH, CH-C=C-CH Ethyl methyl acetylene CH2=CH-C≡CH Vinyl acetylene (2). IUPAC 3)烯炔.CH-CH= CH-CH2-C≡C=CH2. Nomenclature: (1). 看成乙炔的衍生物(derivative). CH3CH2 - CC - CH3 Ethyl methyl acetylene CH2=CH - CCH Vinyl acetylene (2). IUPAC. (3). 烯炔. CH3 CH CH CH2 C C CH3