At 110掳C, the highest oligomer yield is achieved by an initial H-Beta (33 wt %), while samples subjected to citric acid treatment (H-Beta-1), steam heating (H-Beta-2), and combined treatment (H-Beta-3) are less active in oligomerization, isomers being yielded as the main product....
The major disadvantages with the above prior-art process are the formation of mixture of isomers such as ethyl (E)-5-(tritylthio)pent-3-enoate (X) and ethyl (E)-5-(tritylthio)pent-2-enoate (Xa); and (E)-5-(tritylthio)pent-3-enal (XI) & (E)-5-(tritylthio)pent-2-enal (XIa...
For both normal pantene isomers the condensation of neutral molecules on the parent ion (C 5H 10) n + is a major reaction path at low pressures. Besides this family of ions all other ion families seen to originate from secondary ion species formed either in proton- or hydrogen-transfer ...
The diastereomeric trans-chloro(N,N-dimethyl-d-phenylglycine)(3-methyl-1-phenylpent-1-ene)platinum(II) complexes, derived by coordination of the enantiomeric and geometric isomers of 3-methyl-1-phenylpent-1-ene (2), were separated by HPLC. Four trans- and two cis-olefin complexes were ...
EEE isomersStereoselective formationNear-IR dyesCy5 TAM+ dyeThe unequivocal solid-state structure and stereochemistry of the unsymmetric leuco-triarylmethane (Un-LTAM) dye 2,2′-{(E)-4-(phenyl)pent-2-ene-1,5-diylidene}bis(1,3,3-trimethylindoline) derivatives were established using X-ray ...