STUDIES ON d-ORBITAL CONJUGATION. 11. LACK OF AROMATICITY IN SYSTEMS CONTAINING A CARBANION-SULFONE DOUBLE BOND' Sir : With the developing evidence2 that the sulfone group, and other systems with strongly electro- negative second row elements, can interact with ad- jacent unsaturated centers by a conjugation mech- anism, it has become increasingly common to write structures such as I, with a double bond which (prob- ably) involves the use of a ...