Qhov sib txawv tseem ceeb ntawm pyridine thiab pyrimidine yog cov qauv pyridine zoo li cov qauv ntawm benzene nrog ib pab pawg methyl hloov los ntawm nitrogen atom, whereas pyrimidine qauv, txawm tias nws ib yam nkaus li cov qauv ntawm benzene, muaj ob pawg methyl hloov los ntawm nitrogen atoms.
Pyridine thiab pyrimidine yog cov organic tebchaw. Cov no yog lub npe hu ua heterocyclic organic compounds vim tias lawv yog cov qauv cyclic muaj ob hom atoms ua lub nplhaib. Cov qauv nplhaib no muaj cov pa roj carbon thiab nitrogen atoms.
YPyridine yog dab tsi?
Pyridine yog ib qho heterocyclic organic compound uas muaj cov tshuaj formula C5H5N. Cov qauv ntawm cov compound no zoo ib yam li cov qauv ntawm benzene, nrog ib pawg methyl hloov los ntawm nitrogen atom. Hais txog cov khoom, pyridine yog ib qho tsis muaj zog alkaline thiab muaj nyob rau hauv cov kua hauv lub xeev; nws tshwm sim raws li cov kua nplaum. Tsis tas li ntawd, nws tsis muaj xim thiab muaj qhov txawv ntawm cov ntses zoo li tsw. Tsis tas li ntawd, cov kua no yog dej-soluble thiab yog heev flammable
Daim duab 01: Cov qauv ntawm Pyridine
Ntxiv mus, pyridine yog diamagnetic. Cov qauv ntawm cov molecule yog hexagon. C-N daim ntawv cog lus luv dua li C-C daim ntawv cog lus. Thaum xav txog crystallization ntawm pyridine, nws crystallizes nyob rau hauv lub orthorhombic siv lead ua system. Txawm li cas los xij, pyridine molecule yog cov qauv tsis muaj hluav taws xob vim tias muaj ntau cov electronegative nitrogen atom. Yog li ntawd, nws nyhav dhau los ntawm electrophilic aromatic hloov cov tshuaj tiv thaiv. Lwm qhov laj thawj rau lub peev xwm no yog qhov muaj ib leeg electron khub ntawm nitrogen atom.
Thaum xav txog cov ntawv thov ntawm pyridine, nws yog qhov tseem ceeb hauv cov tshuaj tua kab, ua cov kuab tshuaj polar-basic, raws li Karl Fischer reagent hauv organic synthesis, thiab lwm yam.
YPyrimidine yog dab tsi?
Pyrimidine yog ib qho tshuaj tsw qab heterocyclic uas muaj cov tshuaj formula C4H4N2 Cov tshuaj no muaj nitrogen atoms hauv 1 thiab 3 txoj haujlwm. Nws yog lub hauv paus nitrogen uas suav nrog peb lub hauv paus loj nitrogen ntawm DNA: cytosine, thymine, thiab uracil. Cov molar loj ntawm cov tshuaj no yog 80 g / mol.
Daim duab 02: Cov qauv ntawm Pyrimidine
Nyob hauv pyrimidine, pi-electron ceev yog tsawg vim tias muaj cov heteroatoms hauv lub nplhaib. Yog li, nws ua rau cov khoom sib xyaw ua rau muaj kev hloov pauv ntawm nucleophilic aromatic. Tsis tas li ntawd, qhov sib xyaw ua ke yog qhov yooj yim vim tias muaj ib qho hluav taws xob ib leeg ntawm cov nitrogen atom.
Qhov txawv ntawm Pyridine thiab Pyrimidine yog dab tsi?
Ob leeg pyridine thiab pyrimidine yog heterocyclic organic compounds. Txawm li cas los xij, qhov sib txawv tseem ceeb ntawm pyridine thiab pyrimidine yog cov qauv pyridine zoo li cov qauv ntawm benzene nrog ib pawg methyl hloov los ntawm nitrogen atom, tab sis txawm tias cov qauv pyrimidine zoo ib yam li cov qauv ntawm benzene, nws muaj ob pawg methyl hloov los ntawm nitrogen atoms.. Yog li, cov tshuaj formula pyridine yog C5H5N, hos cov tshuaj formula ntawm pyrimidine yog C4 H4N2 Thiab, molar mass ntawm pyridine yog 79 g / mol, thaum molar mass ntawm pyrimidine yog 80 g / mol. Tsis tas li ntawd, cov pyrimidine molecule yog pi-electron tsis muaj ntau tshaj li pyridine vim tias muaj ob lub nitrogen atoms txo cov pi electrons tam sim no nyob rau hauv lub nplhaib.
Ntxiv mus, pyrimidine yog qhov yooj yim dua li pyridine. Ntawm no, lub hauv paus yog txiav txim los ntawm ib leeg electron khub ntawm nitrogen atoms nyob rau hauv no molecule. Txij li thaum pyrimidine muaj ob lub nitrogen atoms, nws yog qhov yooj yim dua piv.
Hauv qab infographic qhia txog qhov sib txawv ntawm pyridine thiab pyrimidine.
Summary – Pyridine vs. Pyrimidine
Ob leeg pyridine thiab pyrimidine yog heterocyclic organic tebchaw, thiab lawv cov qauv zoo ib yam li cov qauv ntawm benzene. Txawm li cas los xij, qhov sib txawv tseem ceeb ntawm pyridine thiab pyrimidine yog pyridine muaj ib pawg methyl hloov los ntawm nitrogen atom nyob rau hauv benzene nplhaib, whereas pyrimidine muaj ob pawg methyl hloov los ntawm nitrogen atoms.
