▁known , ▁they ▁are ▁called ▁d ial k yl ▁or ▁di ary l ▁carbon ates , ▁respectively . ▁The ▁simplest ▁members ▁of ▁these ▁classes ▁are ▁dim eth yl ▁carbon ate ▁and ▁di phen yl ▁carbon ate . ▁ ▁Alternatively , ▁the ▁carbon ate ▁groups ▁can ▁be ▁linked ▁by ▁a ▁ 2 - ▁or ▁ 3 - car bon ▁bridge , ▁forming ▁cy clic ▁comp ounds ▁such ▁as ▁eth yl ene ▁carbon ate ▁and ▁trim eth yl ene ▁carbon ate . ▁The ▁brid ging ▁comp ound ▁can ▁also ▁have ▁subst itu ents , ▁e . g . ▁CH 3 ▁for ▁pro py l ene ▁carbon ate . ▁Instead ▁of ▁terminal ▁alk yl ▁or ▁ar yl ▁groups , ▁two ▁carbon ate ▁groups ▁can ▁be ▁linked ▁by ▁an ▁ali ph atic ▁or ▁a rom atic ▁b if unction al ▁group . ▁ ▁A ▁third ▁family ▁of ▁carbon ates ▁are ▁the ▁polym ers , ▁such ▁as ▁poly ( pro py l ene ▁carbon ate ) ▁and ▁poly ( bis phen ol ▁A ▁carbon ate ) ▁( L ex an ). ▁ ▁Pre par ation ▁Organ ic ▁carbon ates ▁are ▁not ▁prepared ▁from ▁in organ ic ▁carbon ate ▁sal ts . ▁▁ ▁Two ▁main ▁routes ▁to ▁carbon ate ▁est ers ▁are ▁pract iced : ▁the ▁reaction ▁of ▁an ▁alco hol ▁( or ▁phen ol ) ▁with ▁ph os g ene ▁( ph os gen ation ), ▁and ▁the ▁reaction ▁of ▁an ▁alco hol ▁with ▁carbon ▁mon ox ide ▁and ▁an ▁ox id izer ▁( ox id ative ▁car