Concept explainers
Interpretation: Among 15 different structures of the molecular formula
Concept Introduction:
In dash line formula, all the symbols of atoms and the bonding electron pair lines are shown.
In a condensed format, the symbols of atoms are listed in the order as they appear in the structure of the molecule without bond lines or dashes.
In bond-line formula, the bonds between the atoms are drawn in a zigzag format and every end point is considered a carbon atom.
In three-dimensional representations of any molecule, the bonds in the plane of a paper are represented using ordinary lines, the bonds in front of the paper are indicated by solid wedges, whereas the bonds behind the paper are indicated by dashed wedges.
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Organic Chemistry
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- Draw the shapes of the following molecules and ions in 3-dimension. Show clearly any lone pairs of electrons on the central atom, state the number of bond pairs and lone pairs of electrons on the central atom and name the shape of the molecule or ion. (a) CH3+, methyl carbocation (b) HOBr, bromic (I) acid (c) NCl3, nitrogen trichloride Provide everything stated in the instructions for each compound.arrow_forwardHydrogen cyanide can be catalytically reduced with hydro-gen to form methylamine. Use Lewis structures and bond ener-gies to determine ΔH°ᵣₓₙ for HCN(g)+2H₂(g)→CH₃NH₂(g)arrow_forwardChange ethane into 1,2-ethanediol (HOCH2CH2OH) by removing one hydrogen atom from each carbon atom and replacing with a hydroxide (-OH) group. Draw a Lewis structure for 1,2-ethanediol.arrow_forward
- Methanal can be made through the partial oxidation of methane using O2 in the presence of a catalyst: CH4 (g) + O2 (g) → CH2O(g) + H,O(g) a. Use bond dissociation enthalpies to estimate the enthalpy change for this reaction. Bond ΔΗ (kJ/mol) C-H 413 O=0 498 O=C 745 0-H 463 Enthalpy change = kJ b. Calculate the enthalpy change for this reaction from enthalpies of formation. Substance A;H (kJ/mol) CH4 (g) -74.87 O2 (g) H2 O(g) -241.8 CH20(g) -115.9 Enthalpy change kJarrow_forwardFor each compound in the table below, decide whether there would be any hydrogen-bonding force between molecules of the compound, or between molecules of the compound and molecules of water. name dimethyl ether iodomethane acetic acid compound formula or Lewis structure H T H-C-Ö-C-H I H HILIA CH₂I | H H :O: | || H-C-C-O-H Between molecules of the compound? O yes O no O yes O no hydrogen-bonding force O yes O no Between molecules of the compound and molecules of water? O yes Ono O yes O no O yes O no X Sarrow_forwardAnswer the questions in the table below about the shape of the methanone (H₂CO) molecule. How many electron groups are around the central carbon atom? Note: one "electron group" means one lone pair, one single bond, one double bond, or one triple bond. What phrase best describes the arrangement of these electron groups around the central carbon atom? (You may need to use the scrollbar to see all the choices.) (choose one) X Sarrow_forward
- For the following descriptions of molecules, draw the Lewis structure (showing all atoms, lone pairs, formal charges) of the molecule and show all bond angles (assuming ideal VSEPR angles). An organic compound with the molecular formula H3CNO2. C is sp2 hybridized, N is sp3 hybridized, one O is sp² hybridized, while the second O is sp3 hybridized. An organic compound with the molecular formula H2CNO*. Both C and O are sp hybridized while N is sp³ hybridized.arrow_forwardan organic compound containing an aromatic six-membered ring (benzene) and a carboxylic acid functional group has a molecular formula of C6H5CO2H. Draw the corresponding skeletal structurearrow_forwardDuring periods of strenuous exercise, the buildup of lactic acid [CH;CH(OH)CO,H] causes the aching feeling in sore muscles. Convert this condensed structure to a Lewis structure of lactic acid.arrow_forward
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