The three golden lions on a red background, symbolising England, occupy the first and fourth quarters. The Arms of Scotland, a red lion rearing on its hind legs inside a red border, are in the second quarter, and the Arms of Ireland's golden harp with silver strings on a blue background-are in the third quarter.
Once it is reduced to QH2, ubiquinone delivers its electrons to the next complex in the electron transport chain. Q receives the electrons derived from NADH from complex I and the electrons derived from FADH2 from complex II, including succinate dehydrogenase. This enzyme and FADH2 form a small complex that delivers electrons directly to the electron transport chain, bypassing the first complex.
Furthermore, cyclooctatetraene has 8 Ï-electrons, a number not consistent with the Hueckel HÃ¼ckel. Rule benzene is the archetypical aromatic. Compound it is, planar bond=angles, 120Âº all carbon atoms in the ring are sp 2, hybridized and the-pi orbitals are occupied by 6. electronshe resulting planar ring meets the first requirement for aromaticity, and the Ï-system is occupied by 6 electrons, 4 from the two double bonds and 2 from the heteroatom, thus satisfying the Hueckel HÃ¼ckel. Rule four illustrative examples of aromatic compounds are shown. above