Ajụjụ Ihe Nlereanya Na-akọwa Àgwà nke Atọm Kabọn
Atọm carbon bụ ihe dị oke mkpa na kemistri organic na bayoloji n'ihi ikike ya ịmepụta ọtụtụ njikọ covalent na ihe ndị ọzọ. Njirimara pụrụ iche a nke atọm carbon na-eme ka ọ bụrụ ntọala nke ndụ niile dị n'ụwa. N'isiokwu a, anyị ga-atụle ọtụtụ nsogbu atụ na nkọwa ha gbasara njirimara pụrụ iche nke atọm carbon.
Pendahuluan
Atọm carbon nwere nọmba atọm nke 6, nke pụtara na o nwere proton isii n'ime nucleus na elektrọn isii gbara ya gburugburu. A na-ekesa elektrọn ndị a n'ofe shei abụọ: elektrọn abụọ n'ime shei mbụ na elektrọn anọ n'ime shei nke abụọ, ma ọ bụ valence,. Isi ihe dị na atọm carbon bụ ikike ya ịmepụta njikọ covalent anọ na atọm ndị ọzọ, na-enye ohere maka ọtụtụ nhazi dị iche iche.
Ajụjụ na Mkparịta ụka Ihe Nlereanya
Ajụjụ nke 1: Nhazi Electron nke Carbon
1. Chọpụta nhazi elektrọn nke atọm carbon.
Azịza:
Atọm carbon nwere ọnụọgụ atọm nke 6, yabụ ọnụọgụgụ elektrọn bụkwa 6. Enwere ike ide nhazi elektrọn ya dị ka:
– Mkpụkọ mbụ (k) nwere elektrọn abụọ.
– Mkpụkpu nke abụọ (l) nwere elektrọn anọ.
Yabụ, nhazi elektrọnik bụ:
\[ 1s^2 2s^2 2p^2 \]
Ajụjụ nke 2: Njikọ Covalent na Carbon
2. See usoro Lewis nke molekul methane (CH₄).
Azịza:
Methane bụ molekul nke nwere otu atọm carbon na atọm hydrogen anọ. Atọm carbon nwere elektrọn valen anọ ma chọọ elektrọn anọ ọzọ iji nweta nhazi octet. Atọm hydrogen ọ bụla nwere otu elektrọn valen ma chọọ otu elektrọn ọzọ. Atọm carbon na-emepụta njikọ covalent otu na atọm hydrogen anọ, yabụ nhazi Lewis nke methane bụ dịka ndị a:
\[
H \ anọ H
\ \ | \ /
\quad C
\ /|\
H \ anọ H
\]
Ajụjụ nke 3: Carbon Isomers
3. Kpọọ aha ma kọwaa ụdị isomer abụọ nke ihe ndị dị ndụ nwere carbon nwere ike ịmepụta.
Azịza:
E nwere ụdị isomers abụọ bụ́ isi nke ihe ndị sitere n'okike nwere carbon nwere ike ịmepụta, ya bụ:
1. Isomers nhazi: Isomers nhazi bụ ihe mejupụtara nwere otu usoro molekul mana ha dị iche n'ụzọ esi ejikọta atọm ha (usoro nhazi). Dịka ọmụmaatụ, C₄H₁₀ nwere isomer nhazi abụọ, butane na isobutane.
2. Isomers Geometric (Stereoisomers): Isomers Geometric bụ ụdị isomer ebe a na-ejikọ atọm n'otu usoro mana ha nwere ebe dị iche iche. Ihe atụ bụ isomerism cis-trans na alkenes dịka 2-butene (cis-2-butene na trans-2-butene).
Ajụjụ nke 4: Ngwakọta na Carbon
4. Chọpụta ụdị njikọta nke na-eme na atọm carbon dị na molekul ethylene (C₂H₄).
Azịza:
Mkpụrụ ndụ ethylene (C₂H₄) nwere atọm carbon abụọ ejikọtara site na njikọ abụọ. N'ime njikọ covalent abụọ, otu n'ime njikọ ahụ bụ njikọ sigma (σ) na nke ọzọ bụ njikọ pi (π).
Atọm carbon dị na ethylene bụ sp² a gwakọtara agwakọta, nke pụtara na atọm carbon ọ bụla na-eji otu s orbital na abụọ p orbital mepụta orbital hybrid atọ sp².
\[
\quad H \quad H
\ | \ /
\quad C=C
\ / \ |
H \ anọ H
\]
Orbitals sp² atọ ahụ na-etolite njikọ sigma na atọm hydrogen abụọ na otu atọm carbon ọzọ, ebe orbitals p ndị ọzọ na-etolite njikọ pi.
Ajụjụ nke Ise: Àgwà nke ihe mejupụtara Hydrocarbon
5. Kọwaa ihe ndị dị na kemịkalụ na nke anụ ahụ nke ihe ndị mejupụtara hydrocarbon.
Azịza:
Ihe mejupụtara hydrocarbon bụ naanị carbon na hydrogen. Njirimara anụ ahụ na kemịkalụ nke hydrocarbon gụnyere:
Njirimara Anụ Ahụ:
1. Usoro Nchịkọta: Hydrocarbons nwere obere agbụ carbon (1-4 atọm carbon) na-abụkarị gas n'ọnọdụ okpomọkụ ụlọ. Hydrocarbons nwere agbụ carbon dị ọkara (5-16 atọm carbon) na-abụkarị mmiri mmiri, ebe ndị nwere agbụ ogologo (karịa 16) na-abụkarị ihe siri ike.
2. Njupụta: Mmiri kabọn anaghị agbaze n'ime mmiri dịka mmiri, ọtụtụ n'ime ha anaghị agbaze n'ime mmiri n'ihi na ha anaghị agbaze n'ime pola.
3. Ebe Mgbaze na Mmiri: Hydrocarbons nwere ogologo agbụ carbon nwere ebe mgbaze na mmiri ọkụ dị elu n'ihi ike siri ike nke London n'etiti molekul.
Njirimara Kemịkalụ:
1. Mmeghachi omume: Hydrocarbons nwere ike ịgafe ụdị mmeghachi omume kemịkalụ dị iche iche dịka ọkụ, halogenation, na polymerization.
2. Ọkụ: Mgbe e jiri oxygen gbaa ya ọkụ, hydrocarbons ga-ewepụta ike n'ụdị okpomọkụ na ìhè, na-emepụta carbon dioxide na mmiri dị ka ihe ndị na-esi na ya apụta.
3. Mgbanwe na Mgbakwunye: Alkenes na alkynes na-emeghachi omume karịa alkanes n'ihi ọnụnọ nke njikọ abụọ, na-enye ha ohere ịnweta mmeghachi omume mgbakwunye ebe atọm ọzọ nwere ike ịgbakwunye na njikọ abụọ ahụ.
Ajụjụ nke 6: Mmetụta dị na Molekụlụ Carbon
6. Kọwaa echiche nke resonance ma nye ihe atụ nke ihe ndị mejupụtara carbon nke na-egosi ya.
Azịza:
A na-eji echiche nke resonance akọwa nhazi molekul nke enweghị ike ịkọwa site na otu nhazi Lewis. Mkpụrụ ndụ ndị a na-egosipụta njikọta ma ọ bụ njikọta nke ọtụtụ nhazi Lewis.
Ihe atụ nke ngwakọta carbon nwere resonance bụ benzene (C₆H₆). Na benzene, atọm carbon isii na-emepụta mgbanaka nwere njikọ otu na nke abụọ. Nhazi a anaghị edozi, mana ọ dị iche n'etiti ụdị abụọ:
\[
\quad \setlength{\unitlength}{0.1cm}
\malite{foto}(20,15)
\put(3,0){\line(1,0){10}}
\put(13,0){\line(2,3){5}}
\tinye(18,7.5){\ahịrị(-2,3){5}}
\put(8,15){\line(-2,-3){5}}
\put(3,7.5){\line(1,0){10}}
\ọgwụgwụ{foto}
\quad \text{\scriptsize (Resonance)}
\]
Ihe mejupụtara a nwere mwepụ elektrọn nke na-eme ka ọ kwụsie ike nke ọma.
Mmechi
Atọm carbon nwere ihe pụrụ iche nke na-eme ka ọ dị mkpa na kemistri organic. Site na nọmba atọm ya nke 6, carbon nwere ike ịmepụta njikọ covalent anọ ma mepụta ọtụtụ ihe owuwu dị mgbagwoju anya dịka agbụ, mgbaaka, na molekul alaka. N'isiokwu a, anyị atụleela ọtụtụ nsogbu na mkparịta ụka ha gbasara nhazi elektrọn, njikọ covalent, isomerism, njikọta, ihe onwunwe hydrocarbon, na resonance. Nghọta zuru oke nke ihe pụrụ iche nke atọm carbon na-eme ka ọmụmụ ihe dị irè ma dị irè karị na kemistri organic na ngwa ya dị iche iche na ụlọ ọrụ mmepụta ihe.
