Concept explainers
Interpretation:
The more stable carbocation in the given pair is to be identified.
Concept introduction:
The carbocation becomes stable when atoms or groups attached to it stabilize the positive charge on it.
The induced polarization of sigma bond is called inductive effect.
The electron donating atom or group has a positive inductive effect that stabilizes the positive charge on carbon.
The electron withdrawing atom or group has negative inductive effect that destabilizes the positive charge on carbon.
The alkyl groups have electron donating inductive effect and stabilize carbocation (carbon with positive charge).
The alkyl groups also show delocalization of electrons in sigma bonds through hyperconjugation and stabilized carbocation.
Hyperconjugation is the delocalization of electrons in
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ORGANIC CHEMISTRY-PACKAGE >CUSTOM<
- Can molecules with the molecular formulas below exist? (a) CH400 (b) H₂NO (c) C₂HgNarrow_forwardCalculate AHrxn for the reaction: CH4 (9) +4 Cl(g) → CCl4 (g) + 4 HCl(g) Use the following reactions and given AH´s: C(s) + 2 H₂(g) → CH4 (9) C(s) + 2 Cl₂(g) → CCl4 (9) H₂(g) + Cl₂(g) → 2 HCl(g) AH = -74.4kJ AH = -95.7kJ AH = -92.3 kJarrow_forwardComplete energy diagram for the two-step conversion of A–B + C:−→ A:− + B–Carrow_forward
- Estimate the heat released when ethene(CH2=CH2) reacts with HBr to giveCH3CH2Br. Bond enthalpies areC-H : 412 kJ/mol; C-C : 348 kJ/mol;C=C : 612 kJ/mol; C-Br : 276 kJ/mol;Br-Br : 193 kJ/mol; H-Br : 366 kJ/mol. Choose the correct answer:1. 1036 kJ/mol2. 58 kJ/mol3. 424 kJ/mol4. 200 kJ/mol5. 470 kJ/molarrow_forwardIdentify whether the following pairs of structures are: (A) Same compound (B) Constitutional isomers (C) Cis-trans isomers (D) Not isomersarrow_forwardDecide whether each of the molecules in the table below is stable, in the exact form in which it is drawn, at pH = 1. If you decide at least one molecule is not stable, then redraw one of the unstable molecules in its stable form below the table. (If more than one molecule is unstable, you can pick any of them to redraw.) OH O stable O unstable OH X 5 O stable O unstable O stable O stable O unstable OH O unstable OHarrow_forward
- Calculate the AH rxn for the following reaction: C₂H5OH(1) +302(g) a) -1234.7 kJ AH [C₂H5OH()] = -277.7 kJ/mol AH [CO₂(g)] = -393.5 kJ/mol AH [H₂O(g)] = -241.8 kJ/mol b) -357.6 kJ c) 1234.7 kJ d) -751.1 kJ e) 357.6 kJ L Question 18 2CO₂(g) + 3H₂O(1) Listen Write out the net ionic equation for the reaction when strontium nitrate is combined with iron(II) sulfate.arrow_forwardJ of Br G K OH Br H L OCH 3 of 1 M OH NH (i) Compound H is an example of what functional group? Select alternative (ii) Compound G is classified as a: Select alternative ✓. (iii) Which compound has all carbons sp2 hybridised? Select alternative ✓ (iv) Which two compounds in Table 1 are constitutional isomers? Select alternative (v) Which statement best describes the stereochemistry of compo G? Select alternative (vi) Which compound in Table 1 is the MOST polar? Select alternative (vii) What is the systematic (IUPAC) name of compound G? Select alternative (viii) Which compounds will have MORE than 4 signals in their 13C NMR spectra? Select alternative (ix) Which electrophile from Table 1 will react fastest in an SN1 reaction? Select alternative (x) How many constitutionally isomeric alkenes will be formed when compound L reacts with NaOH? Select alternative (xi) Which compound(s) from Table 1 can be used to form a Grignard reagent? Select alternative (xii) Which functional groups can be…arrow_forwarda) which bond is present in alcohols but not alkanes? b) is this band strong or weak (in terms of spectra)? c) what is different about C=O and O-H bonds compared with C=C or C≡C bonds that show weaker signals?arrow_forward
- Draw a structural formula for the major organic product of the following reaction:arrow_forward(a) Describe the molecular geometry expected for 1,2,3-butatriene (H2C=C=C=CH2). (b) Two stereoisomers are expected for 2,3,4-hexatriene (CH3CH=C=C=CHCH3). What should be the relationship between these two stereoisomers?arrow_forwardHow many possible stereoisomers?arrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning