41. Polycyclic aromatic hydrocarbons released into the air from fracking has been linked to potential reproductive problems. 42. The compound is classified as an aromatic hydrocarbon . 43. Then they looked at PAHs, or polycyclic aromatic hydrocarbons , produced by the burning of fossil fuels. 44. :Wisps of red in the cloud are organic molecules called polycyclic aromatic hydrocarbons ( PAHs ). 45. Biphenyl is an aromatic hydrocarbon with a molecular formula ( C 6 H 5 ) 2. 46. Aromatic hydrocarbons have been found in particles of interstellar dust, as well as in certain meteorites.47. This reaction takes place almost exclusively in aromatic hydrocarbons , where it is called electrophilic aromatic substitution. 48. The Red Rectangle is known to be particularly rich in polycyclic aromatic hydrocarbons ( PAHs ). 49. During his study of dibenzopyrenes, he discovered a molecular arrangement involving the framework of aromatic hydrocarbons . 50. Thermal rearrangements of aromatic hydrocarbons are generally carried out through flash vacuum pyrolysis ( FVP ).
