iindaba

IKhemistri ye-H2S yokuNciphisa. Sisebenzisa iipropati ezi-3 ezibalulekileyo ze-molecule ye-H2S ngexesha lenkqubo yokunciphisa i-H2S.

I-H2S yigesi eneasidi kwaye iya kutyiwa ngeeamine ezininzi kwi-amininium hydrosulphide. Indlela esabela ngayo iyabuyiswa kwaye yenza isiseko seyunithi yokurisayikilisha iamine; ityuwa yahlulwa emva kwi-H2S kunye ne-amine ekhululekile ngobushushu. Le nkqubo nayo iyayisusa iCO2 kuba ikwayigesi eneasidi.

I-H2S yi-arhente yokunciphisa kwaye ngoko inokufumaneka ngokukhawuleza i-oxidized. Imeko ye-valence yesulfure yi--2 kwi-H2S kwaye inokuthi ifakwe kwi-0, i-sulfure ye-elemental (umz. i-alkaline sodium nitrite okanye i-hydrogen peroxide) okanye i-+6, i-sulphate nge-chlorine dioxide, i-hypohalites njl.

I-H2S yi-nucleophile enamandla ngenxa ye-athomu yesulfure esisiseko se-Lewis esithambileyo. Ii-elektroni zikwiqokobhe leelektroni ezi-3, ngakumbi ukusuka kwinucleus, zihamba ngakumbi kwaye zifuduka ngokulula. Umzekelo ogqibeleleyo wale nto kukuba i-H2O ilulwelo olunendawo yokubila ye-100 C ngelixa i-H2S, i-molecule enzima, yigesi eneqondo lokubilisa -60 C. Ipropathi esisiseko ye-Lewis ye-athomu ye-oxygen yenza i-hydrogen enamandla kakhulu. iibhondi, ngaphezulu kune-H2S, kungoko umahluko omkhulu wenqaku lokubila. Ikhono le-nucleophilic ye-athomu yesulfure isetyenziswe ekuphenduleni nge-triazine, i-formaldehyde kunye ne-hemiformal okanye i-formaldehyde releasers, i-acrolein kunye ne-glyoxal.