[理學(xué)]c3-group1-alkali-metals-wenkub.com
2025-01-16 14:39 本頁面
【正文】 H2 Fe(CO)5 + 2e = [Fe(CO)4]2 + COSalt solubility rule and thermodynamic explanation (Largelarge and smallsmall)n ΔGdissol. =ΔHdissol. –TΔSdissol. n ΔSdissol is of less significance for dissolution of a salt.n ΔHdissol is the main factor to affect the dissolution.n ΔHdissol = Ucrystal +ΔHhydrationConclusion:1. rM+ ≈ rX U prevails2. rM+ ＞＞ rX rM+ ＜＜ rX ΔHdissol dominates離子 型鹽溶解性規(guī)律n 相差易 溶n 大對 大，小對小，不易溶 n 大 對小， 小 對大，較易溶n Explain why LiOH is less souble than NaOH?Macrocyclic plexes 1987 Noble Prize in Chemistry 美國化學(xué)家首次報(bào)道 “冠醚 ” (crown ether) 美國有機(jī)化學(xué)家提出 “主 客體化學(xué) ”（ hostguest chemistry） 法國生物化學(xué)家首次報(bào)道 “穴醚 ” (cryptant) Crown ethern 12crown4, 15crown5, 18crown6, dibenzo18crown6, and diaza18C6n Great affinity to alkali metalsn Kassoc. Depends on the match between the radius of crown ether and the size of M+In the presence of 18crown6 potassium permanganate dissolves in benzene – “purple benzene” [18C6,K]+Cryptand:3dimensional interior cavity。 △ Hhydration = 519 kJ radicalO2+ Dioxygenyl
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