New ribonucleoside analogues containing thio-substituted 1,3,4-triazole as heterocyclic base have been synthesized via condensation of the central intermediate 1 with various acids, esters, amides, and anhydrides in a...New ribonucleoside analogues containing thio-substituted 1,3,4-triazole as heterocyclic base have been synthesized via condensation of the central intermediate 1 with various acids, esters, amides, and anhydrides in anhydrous solvent followed by deprotection.展开更多
The extraction of zinc by di-(2-ethylhexyl)-dithiophosphoric acid(D2EHDTPA)-trioctylamine(TOA) was investigated.Conductance titration and interfacial pressure measurement showed that when D2EHDTPA and TOA were mixed t...The extraction of zinc by di-(2-ethylhexyl)-dithiophosphoric acid(D2EHDTPA)-trioctylamine(TOA) was investigated.Conductance titration and interfacial pressure measurement showed that when D2EHDTPA and TOA were mixed they reacted and formed an electrolyte of ionic pairs.The extraction of zinc by the electrolyte was of antisynergistic nature,and the reaction was Zn2＋＋ 2BHA(O)→ Zn-(O)＋ 2B(O)＋ 2H＋ (subscript (o) stand for“ oil phase” ).The zinc extraction was an endothermic reaction ,the heat of reaction was 130.1 kJ· mol－ 1.Some phenomena of interface concerned were also discussed.展开更多
文摘New ribonucleoside analogues containing thio-substituted 1,3,4-triazole as heterocyclic base have been synthesized via condensation of the central intermediate 1 with various acids, esters, amides, and anhydrides in anhydrous solvent followed by deprotection.
文摘The extraction of zinc by di-(2-ethylhexyl)-dithiophosphoric acid(D2EHDTPA)-trioctylamine(TOA) was investigated.Conductance titration and interfacial pressure measurement showed that when D2EHDTPA and TOA were mixed they reacted and formed an electrolyte of ionic pairs.The extraction of zinc by the electrolyte was of antisynergistic nature,and the reaction was Zn2＋＋ 2BHA(O)→ Zn-(O)＋ 2B(O)＋ 2H＋ (subscript (o) stand for“ oil phase” ).The zinc extraction was an endothermic reaction ,the heat of reaction was 130.1 kJ· mol－ 1.Some phenomena of interface concerned were also discussed.
