Aromatic compounds

Aromatic Compounds: Aromatic compounds, also known as arenes or aromatics, are chemical compounds that contain a ring of continuously overlapping p orbitals (planar). They have a delocalized pi electron in the ring. They are characterized by one or more planar rings of atoms joined by covalent bonds of two different kinds. The unique stability of these compounds is referred as Aromacity. Although aromatic has its origin from compounds characterized by its odor or fragrant, now, in chemistry, to

1. Introduction The release of volatile aromatic organic compounds into the environment is a serious problem as they distribute between the different phases in natural systems. Sediments can be considered as a sink for volatile aromatic organic compounds because of their hydrophobic nature and the resulting affinity to the sediment 's organic matter. Organic matter consists of soft carbon, where portioning is the main sorption process and hard carbon, where pore filling mechanisms dominate (Zhao

the IR has sp3 C-H, C=O and C=C aromatic stretch (Table 1) that correspond to the literature6, however, there is also the presence of an O-H peak that is not expected and is due to the presence of unreacted benzoin. This helps to explain the low yield of Dilantin (20.9%) because not all of the crude benzil would have reacted as some of it would have been benzoin. The Dilantin was successfully synthesis as the final product showed N-H, sp3 C-H, C=O and C=C aromatic stretches (Table 1) that correspond

Tetraphenylcyclopentadienone In this laboratory experiment a synthesis was performed through several separate steps. The purpose of the experiment was to synthesize tetraphenylcyclopentadienone from benzaldehyde and to run reactions on carbonyl containing compounds. There was a total of three steps that led up to the synthesis of the final product, tetraphenylcyclopentadienone. The first step of the experiment was the condensation of benzaldehyde to yield benzoin. Thiamine catalyst along with water and

Preparation of 4-bromoaniline Introduction Aromatic compounds tend to undergo electrophilic aromatic substitutions rather than addition reactions. Substitution of a new group for a hydrogen atom takes place via a resonance-stabilized carbocation. As the benzene ring is quite electron-rich, it almost always behaves as a nucleophile in a reaction which means the substitution on benzene occurs by the addition of an electrophile. Substituted benzenes tend to react at predictable positions. Alkyl groups

For this lab, certain actions were performed to facilitate the optimal conditions for the Grignard reaction to proceed. As mentioned above, forming the Grignard reagent and the Grignard reaction must take place in dry, anhydrous conditions. This was why the glassware was initially placed in the oven to evaporate any moisture that was present on the glassware. Additionally, the magnesium used in the experiment needed to be dry too, so it was also placed in the oven to be heated. Creating a dry environment

tested compounds were all arenes, their reactivities differ as they contain different types of hydrogens. The hydrogens could be of three different types and could also differ in being bonded to carbons that are attached to a different number of other carbons. The three different types of hydrogens that could be found were aromatic, aliphatic, and benzylic. The first category is aromatic hydrogens, which are attached to sp2 carbons or are those directly bonded to an aromatic ring. Aromatic hydrogens

Experiment B10- Photocromism and Piezochromism Reece Harms 4320288 Introduction This experiment investigates an oxidative coupling reaction in an to synthesise triphenylimidazole dimer from 2,4,5-triphenyl-1H-imidazole. The resulting compound was investigated for both photochromic and piezochromic properties by way of formation of a stable radical, utilizing visual observations and UV-Vis as a means of distinction. Both the oxidative coupling reaction and the dimers interaction with light

toluene, ethylbenzene, tert-butylbenzene, cyclohexane, and methylcyclohexane. All solutions were a dark orange right after the addition of bromine. Toluene had 1º benzylic and 2º aromatic hydrogens. Ethylbenzene had 2º benzylic, 1º aliphatic, and 2º aromatic hydrogens. tert-butylbenzene had 1º aliphatic and 2º aromatic hydrogens. Cyclohexane had 2º aliphatic hydrogens and methylcyclohexane had 1º, 2º, and 3º aliphatic hydrogens. In the set that was exposed to light, Ethylbenzene was the first to

reaction with a halogenated molecule, thus producing a hydrocarbon halogen (R-X) compound, and more halogenation molecule thus allowing the reaction to continue on to completion. A control mechanism will allow for the prediction of what product will be obtained from a radical reaction. If random chance of the halogen