( ( Compounds ( having ( ( exactly ( four chalcogens ) ) ( -LRB- ( ( ( i.e. , ) ( oxygen ( , ( sulfur ( , ( selenium ( , ( or tellurium ) ) ) ) ) ) ) ) -RRB- ) ) ) ) ) ( ( ( bonded directly ) ( to ( the ( same ( phosphorus atom ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Compounds)) (VP (VBG having) (NP (NP (RB exactly) (CD four) (NNS chalcogens)) (PRN (-LRB- -LRB-) (NP (NP (NNP i.e.)) (, ,) (NP (NN oxygen) (, ,) (NN sulfur) (, ,) (NN selenium) (, ,) (CC or) (NN tellurium))) (-RRB- -RRB-))))) (VP (VBD bonded) (ADVP (RB directly)) (PP (TO to) (NP (DT the) (JJ same) (NN phosphorus) (NN atom)))) (. .)))
Compounds having exactly four chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) bonded directly to the same phosphorus atom.
(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))))))))) (. .)))