... Select a Journal or Book ... Crown ethers containing a malonate functionalities have been initially synthesized and studied by Bradshaw, Izatt, and co-workers ... H 2 C C−), 4.2 (m, 4H; −COOCH 2 CH 2 O−), 3.8−3.6 (m, 26H; −COOCH 3 and −OCH 2 CH 2 O−), 2.98 (s, 4H; allylic ...