( ( The ( sulfone group ) ) ( ( is ( ( a ( sulfur atom ) ) ( ( ( doubly ( bonded ( to ( two ( oxygen atoms ) ) ) ) ) and ) ( singly ( bonded ( to ( two ( carbon centers ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ sulfone) (NN group)) (VP (VBZ is) (NP (NP (DT a) (NN sulfur) (NN atom)) (ADJP (ADJP (RB doubly) (VBN bonded) (PP (TO to) (NP (CD two) (NN oxygen) (NNS atoms)))) (CC and) (ADJP (RB singly) (VBN bonded) (PP (TO to) (NP (CD two) (NN carbon) (NNS centers))))))) (. .)))
The sulfone group is a sulfur atom doubly bonded to two oxygen atoms and singly bonded to two carbon centers.
(ROOT (S (NP (DT An) (NN ether)) (VP (VBZ is) (NP (NP (DT an) (JJ organic) (NN compound)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (CD two) (NN hydrocarbon) (NNS groups)) (VP (VBP are) (VP (VBG bonded) (PP (TO to) (NP (DT the) (JJ same) (NN oxygen) (NN atom))))))))) (. .)))