Concept explainers
Interpretation:
The Lewis structure for each negative ion is to be written and the formal negative charge is to be assigned to the correct atom.
Concept introduction:
The Lewis structure of a molecule is a representation of the molecule in which valence electrons of an atom are involved and are structurally represented.
The number of valence electrons of the atom is equal to the number of the group to which it belongs. Bonding atoms attain stable electronic configuration and a stable electronic configuration, generally, has eight electrons in the valence shell.
To attain stable configuration, atoms share their electrons with each other.
The formal charge is calculated as follows:
Here, F is the formal charge, Z is the group number of the element or valence electrons, S is the number of shared electrons, and U is the number of unshared electrons.
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Organic Chemistry, 12e Study Guide/Student Solutions Manual
- Draw Lewis structures for the following compounds. Remember to enclose ions in square brackets. On your answer sheet, state the number of valence electrons in each compound. (a) NaCN (b) CH 3 Br (c) Ca(OCl) 2arrow_forward(a) Determine the formal charge of oxygen in the following structure. If the atom is formally neutral, indicate a charge of zero. (b) Draw an alternative Lewis (resonance) structure for the compound given in part (a). Show the unshared pairs and nonzero formal charges in your structure. Don't use radicals. Formal charge on O 0arrow_forward(a) Complete the Lewis structure for vinyl chloride by showing all unshared pairs of electrons. (b) Predict the H-C-H, H-C-C, and Cl-C-H bond angles in this molecule. (c) Does vinyl chloride have polar bonds? Is it a polar molecule? Does it have a dipole?arrow_forward
- Draw Lewis structures for each of the following compounds. In each case, specify the number of valence electrons surrounding the central atom. (Assign lone pairs and radical electrons where appropriate.) (Assume the central atom does not contain an expanded octet.) (a) bromine dioxide (BrO2) (b) beryllium bromide (BeBr2) (c) phosphorus pentafluoride (PF5)arrow_forwardQuestion attachedarrow_forwardDraw a Lewis structure for each of the following molecule: (a) chlorodifluoromethane, CHCIF2 (b) propanoic acid C2H5CO2H (basic structure pictured below) (c) acetonitrile, CH3CN ( the framework is H3C-C-N) (d) allene, H2CCCH2arrow_forward
- The two compounds nitrogen dioxide and dinitrogen tetraoxide are introduced in Section 3.13. (a) NO2 is an odd-electron compound. Draw the best Lewis diagrams possible for it, recognizing that one atom cannot achieve an octet configuration. Use formal charges to decide whether that should be the (central) nitrogen atom or one of the oxygen atoms. (b) Draw resonance forms for N2O4 that obey the octet rule. The two N atoms are bonded in this molecule.arrow_forwardWrite Lewis formulas, including unshared pairs, for each of the following. Carbon has four bonds in each compound. (a) Propane (C3H8) (c) Methyl fluoride (CH3F) (b) Methanol (CH4O) (d) Ethyl fluoride (C2H5F)arrow_forwardShow the delocalization of charges in the following structures. Draw the resonance forms and indicate the movement of electrons with curved arrows.Hint: First draw the Lewis structure for each the compound.(i) CH2=CH─O-(ii) CH2=CH─O+arrow_forward
- Write the Lewis structures for the following, and include resonance structures where appropriate. Indicate which has the strongest carbon-oxygen bond.(a) CO2(b) COarrow_forward(i) Draw a complete Lewis dot structure for each of the following compounds. Clearly (ii) indicate all bonds and lone electrons, as well as the formal charge of each atom in the compound. a) NO3 b) NH4* c) CO2arrow_forwardThe arrangement of atoms in several biologically important molecules is given here. Complete the Lewis structures of these molecules by adding multiple bonds and lone pairs. Do not add any more atoms. (a) the amino acid serine: 車 0-H H-C-H H Н—N—с—с—о—н H (b) нон H-N-C-N-H (c) pyruvic acid: ноо н—с—с—с—о—н H. (d) uracil: H (e) carbonic acid: H-0-C-0-Harrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning