Ngā Tauira Pātai me te Kōrero mō ngā Isomera i roto i ngā Hauwaiwaro
I roto i te matū waro, ko ngā isomer he pūhui he rite te tātai ngota engari he rerekē ngā hanganga. He mea nui ngā isomer hauwaiwaro i roto i ngā tono matū maha, i roto i te rangahau me te ahumahi. Ka kapi i tēnei tuhinga ngā tauira me ngā matapakinga o ngā isomer hauwaiwaro, tae atu ki ngā isomer hanganga, ngā isomer āhuahanga, me ngā isomer whatu.
1. Te Whakamāramatanga me ngā Momo o ngā Isomera
I mua i te urunga atu ki ngā tauira pātai me ngā kōrero, me arotake tuatahi tātou i te whakamāramatanga me ngā momo isomers i roto i ngā warowaihā:
– Ngā Iōmera Hanganga: Ngā iōmera he rerekē ngā huarahi e hono ai ngā ngota i roto i te ngota. Kei roto i tēnei momo ko te mekameka, te tūranga, me ngā iōmera mahi.
– Ngā Iōmera Āhua (Cis-Trans, ZE rānei): Ngā iōmera ka puta mai i te whakatakotoranga rerekē o ngā rōpū mahi huri noa i tētahi hononga takirua, i tētahi mowhiti rānei.
– Ngā Isomera Whatu (Ngā Enantiomera): Ngā isomera he ngohe whatu nā te aroaro o ngā ngota waro chiral (ngā waro e herea ana ki ngā whakakapinga rerekē e whā).
2. Ngā Tauira Pātai me te Kōrero
Pātai 1: Te Whakatau i ngā Iōmera Hanganga o C5H12
E hia ngā isomer hanganga ka taea te hanga mēnā ka hoatu he matū ko tōna tauira ngota C5H12?
Kōrero:
Mō ngā pūhui warowaihā me te tātai ngota C5H12 (pentane), e toru ngā isomers hanganga ka taea te hanga:
1. n-Pentane: CH3-CH2-CH2-CH2-CH3
2. Isopentane (2-Methylbutane) : (CH3)2CH-CH2-CH3
3. Neopentane (2,2-Dimethylpropane): (CH3)4C
He rite te tātai ngota o ēnei isomers e toru, engari nā ngā rerekētanga o te hanganga ka rerekē ō rātou āhuatanga ā-tinana me ā-matū.
Pātai 2: Te Whakatau i ngā Iōmera Āhuahanga i roto i te Alkene C4H8
Ki te hoatu he pūhui ko te tātai ngota C4H8, tautuhia ngā isomer āhuahanga ka taea.
Kōrero:
Ka taea te hanga i tētahi pūhui me te tātai ngota C4H8 hei alkene me te hononga takirua kotahi. Ka taea te hanga i ngā isomers āhuahanga e rua mēnā ka whakaarohia te 2-butene:
1. Cis-2-butene: CH3-CH=CH-CH3 (rōpū metil i te taha kotahi)
2. Trans-2-butene: CH3-CH=CH-CH3 (ngā rōpū methyl kei ngā taha rerekē)
Nā ēnei rerekētanga o te whakatakotoranga ā-wāhi ka rerekē ngā āhuatanga ā-tinana, pērā i ngā ira kohua me ngā ira rewa.
Pātai 3: Te Whakatau i ngā Isomera Whatu o te 2-Bromobutane
Ki te mea he 2-bromobutane, he isomer whatu kei tēnei pūhui? Mena koinā, e hia?
Kōrero:
Kei te tūranga tuarua te ngota waro chiral o te 2-Bromobutane (CH3-CHBr-CH2-CH3) nā te mea e honoa ana ki ngā whakakapinga rerekē e whā (CH3-, CH2-CH3, H, me Br). Nō reira, kei tēnei pūhui ngā isomers whatu e rua (enantiomers):
1. (R)-2-Bromobutane
2. (S)-2-Bromobutane
Kāore e taea te tāpiri i ēnei isomers tetahi ki tetahi (whakaata tetahi ki tetahi) ā, he rerekē hoki ngā mahi whatu.
Pātai 4: Ngā Iōmera Hanganga mō te C4H10O
E hia ngā isomer hanganga ka taea te hanga, mēnā kei te whakamahi koe i te tātai ngota C4H10O?
Kōrero:
Ko te tātai ngota C4H10O e tohu ana he waipiro, he etera rānei te matū. Anei ētahi isomers pea:
1. 1-Pūtānora: CH3-CH2-CH2-CH2OH
2. 2-Butanol: CH3-CH2-CHOH-CH3
3. 2-Methyl-1-propanol (Isobutanol) : (CH3)2CH-CH2OH
4. 2-Metil-2-poropanora (t-Pūtanora) : (CH3)3COH
5. Diethyl ether: CH3-CH2-O-CH2-CH3
6. Metila propilēta: CH3-O-CH2-CH2-CH3
He rerekē ngā āhuatanga matū me ngā āhuatanga ā-tinana o ia o ēnei isomers.
Pātai 5: Te Tāutu i ngā Iōmera Āhuahanga me ngā Iōmera Hanganga o C4H6
I runga i te tātai ngota C4H6, tautuhia ngā isomera āhuahanga me ngā isomera hanganga ka taea.
Kōrero:
Ko te tātai ngota C4H6 e pā ana ki tētahi matū alkene me te hononga takirua, ki tētahi alkyne rānei me te hononga takitoru kotahi:
Mō ngā alkene (dienes):
1. 1,2-Pūtātini: CH2=C=CH-CH3
2. 1,3-Pūtātini: CH2=CH-CH=CH2
Mō ngā alkyne:
1. 1-Pūtene: HC≡C-CH2-CH3
2. 2-Pūtene: CH3-C≡C-CH3
Mō te butene-1, ki te whakaarohia ngā isomers āhuahanga:
1. Cis-1,2-Butadiene
2. Trans-1,2-Butadiene
Heoi, kāore he isomera āhuahanga o ngā hanganga he hononga takirua kotahi.
Ringkasan:
I te mārama ki te isomerism i roto i ngā warowaihā, he mea nui kia mārama ki ngā momo isomers rerekē, tae atu ki ngā isomers hanganga, ngā isomers āhuahanga, me ngā isomers whatu. E tumanakohia ana mā ēnei tauira raruraru ka āwhina i ngā ākonga matū me ngā tohunga ki te whai māramatanga ake ki ngā āhuatanga o ngā ngota rerekē ahakoa he rite te tātai ngota.
