Qhov sib txawv tseem ceeb ntawm alternant thiab non alternant hydrocarbons yog tias alternant hydrocarbons tsis muaj rings tsim nrog ib tug khib tus naj npawb ntawm carbon atoms, whereas non alternant hydrocarbons yog cov tebchaw muaj tsawg kawg yog ib lub nplhaib tsim nrog ib tug khib tus naj npawb ntawm carbon atoms.
Alternant hydrocarbons thiab non alternant hydrocarbons yog ob hom loj hydrocarbon tebchaw uas muaj cov qauv nplhaib. Alternant hydrocarbons yog conjugated hydrocarbon systems uas tsis muaj khib-membered nplhaib. Non alternant hydrocarbons yog cov tebchaw uas muaj tsawg kawg yog ib lub nplhaib uas muaj cov lej khib nyiab ntawm carbon atoms.
Alternant Hydrocarbons yog dab tsi?
Alternant hydrocarbons yog conjugated hydrocarbon systems uas tsis muaj khib-membered nplhaib. Cov tshuab no tuaj yeem ua cov txheej txheem ua yeeb yam uas cov pa roj carbon atoms muab faib ua ob pawg. Ib txheej muaj cov pa roj carbon atom nrog cov hnub qub nyob rau hauv ib txoj hauv kev uas tsis muaj ob lub hnub qub lossis tsis muaj hnub qub tau sib koom ua ke. Lub hnub qub teeb muaj cov atom ntau tshaj plaws. Thaum tau txais qhov xwm txheej no, qhov kev txiav txim siab hauv ntiaj teb hauv Huckel kwv yees tau txais daim ntawv yooj yim dua. Qhov no yog vim hais tias cross-diagonal ntsiab ntawm atoms nyob rau hauv tib lub teeb zoo li yuav tsum xoom. Qee qhov piv txwv ntawm lwm cov hydrocarbon tebchaw muaj xws li cyclobutadiene, naphthalene, benzyl radical, thiab lwm yam.
Daim duab 01: Cov qauv tshuaj ntawm Cyclobutadiene, ib qho Alternant Hydrocarbon Compound
Nws muaj peb yam tseem ceeb ntawm alternant hydrocarbons, suav nrog kev sib koom ua ke ntawm molecular orbital energies rau lub pi system, zoo sib xws coefficients rau ob khub molecular orbitals ntawm tib qhov chaw thiab sib npaug ntawm cov pejxeem los yog electron ceev ntawm txhua qhov chaw..
Yog hais tias muaj ib qho khib ntawm atoms nyob rau hauv alternant hydrocarbon, qhov no txhais tau tias nws muaj ib tug unpaired orbital nrog xoom bonding zog. Thaum xav txog qhov orbital no, peb tuaj yeem sau cov coefficients ntawm qhov chaw atomic yam tsis suav. Nyob ntawd, cov coefficient ntawm tag nrho cov orbitals teej tug mus rau lub me me teeb yog xoom, thiab cov sum ntawm cov coefficients nyob ib ncig ntawm lub orbitals uas yog starred yuav tsum yog xoom.
Non alternant Hydrocarbons yog dab tsi?
Non alternant hydrocarbons yog cov tebchaw uas muaj tsawg kawg yog ib lub nplhaib uas muaj tus lej ntawm cov pa roj carbon atom. Azulene, Pentalene, thiab Heptalene yog cov piv txwv ntawm classical non alternant hydrocarbon compounds.
Daim duab 02: Cov Qauv Tshuaj ntawm Azulene, Non alternant Hydrocarbon Compound
Lawv yog bicyclic non alternant hydrocarbon compounds. Cov tebchaw no muaj qhov txaus nyiam pi-them ua haujlwm nrog kev sib law liag ntawm cov koom nrog khib nyiab.
Qhov txawv ntawm Alternant thiab Non alternant Hydrocarbons yog dab tsi?
Alternant hydrocarbons yog conjugated hydrocarbon systems uas tsis muaj khib-membered nplhaib. Non alternant hydrocarbons yog cov tebchaw uas muaj tsawg kawg yog ib lub nplhaib uas muaj cov lej khib nyiab ntawm carbon atoms. Qhov sib txawv tseem ceeb ntawm alternant thiab non alternant hydrocarbons yog tias alternant hydrocarbons tsis muaj rings tsim nrog ib tug khib tus naj npawb ntawm carbon atoms, whereas non alternant hydrocarbons yog cov tebchaw muaj tsawg kawg yog ib lub nplhaib tsim nrog ib tug khib tus naj npawb ntawm carbon atoms. Cyclobutadiene, naphthalene, thiab benzyl radical yog cov piv txwv ntawm alternant hydrocarbons, thaum Azulene, Pentalene, thiab Heptalene yog cov piv txwv ntawm non alternant hydrocarbons.
Hauv qab no yog cov ntsiab lus ntawm qhov sib txawv ntawm alternant thiab non alternant hydrocarbons hauv daim ntawv tabular rau ib sab ntawm kev sib piv.
Summary – Alternant vs Non alternant Hydrocarbons
Alternant hydrocarbons thiab non alternant hydrocarbons yog ob hom loj hydrocarbon tebchaw uas muaj cov qauv nplhaib. Qhov sib txawv tseem ceeb ntawm alternant thiab non alternant hydrocarbons yog tias alternant hydrocarbons tsis muaj rings tsim nrog ib tug khib tus naj npawb ntawm carbon atoms, whereas non alternant hydrocarbons yog cov tebchaw muaj tsawg kawg yog ib lub nplhaib tsim nrog ib tug khib tus naj npawb ntawm carbon atoms.
