Concept explainers
(a)
Interpretation:
For the given skeleton of an anion having the overall formula
Concept introduction:
Lewis structure takes into account only the valence electrons. In the Lewis structure, each single line represents a shared pair of electrons, that is, a bonding pair of electrons. Nonbonding electrons are indicated by dots and are usually paired
(b)
Interpretation:
For the given skeleton of an anion having the overall formula
Concept introduction:
In the Lewis structure each bond represents a shared pair of electrons and the non-bonding electrons are shown by dots. In a molecule or polyatomic ion, charge to an individual atom is determined by the difference between the atoms group number and the actual valence electrons it possesses. For the atoms involved in covalent bonds, the formal charge is determined by assigning both electrons of a lone pair to the atom on which they appear, and half the electrons are assigned to each atom involved in the bond.
(c)
Interpretation:
For the given skeleton of an anion having the overall formula
Concept introduction:
In the Lewis structure each bond represents a shared pair of electrons and the non-bonding electrons are shown by dots. In a molecule or polyatomic ion, charge to an individual atom is determined by the difference between the atoms group number and the actual valence electrons it possesses. For the atoms involved in covalent bonds, the formal charge is determined by assigning both electrons of a lone pair to the atom on which they appear, and half the electrons are assigned to each atom involved in the bond.
Want to see the full answer?
Check out a sample textbook solutionChapter 1 Solutions
Organic Chemistry: Principles and Mechanisms (Second Edition)
- 1.) What is the Lewis structure for the methylthiolate anion, CH3S-. Carbon is the central atom. Show any nonzero formal charges. 2.) Proteins are large molecules that affect almost every function of the human body. Proteins are composed of smaller building blocks called amino acids. The simplest amino acid is glycine. When dissolved in water, two atoms in a glycine molecule have a formal charge. In the lewis structure of glycine C2H5NO2 all bonds are drawn (image is provided), but the unbonded valence electrons (lone pairs) are missing. Copy the structure and draw the missing valence electrons (lone pairs). Locate the 2 atoms that have a nonzero formal charge. Calculate the charge at these sites.arrow_forwardGiven two possible resonance forms of NCS and the associated formal charges. Predict whether a or b is more stable. (a) (b) :N=C=S: c=N=s: -1 0 0 -2 +1 0arrow_forwardWrite Lewis structures for these ions. Show all valence electrons and all formal charges. (a) Bicarbonate ion, HCO3 -arrow_forward
- Write Lewis structures for these ions. Show all valence electrons and all formal charges. (Q) Acetate ion, CH3COO-arrow_forward(b) The Murchison meteorite that landed in Australia in 1969 contained 92 different amino acids, including 21 found in Earth organism A skeleton structure (single bond only) of one of these extraterrestrial amino acids is shown below. Draw a Lewis structure, and identify any atoms having a nonzero formal charge. H3N. C ČH2 ČH3 (c) Draw the orbital diagrams and Lewis symbols to depict the formation of Na* and CI ions from the atoms. Give the formula of the compound formed. (d) The predicted bond length for HF is 109 pm (the sum of the covalent radii of H, 37 pm and F, 72 pm), however the actual bond length for HF is shorter (92 pm). It was observed that the difference between predicted and actual bond lengths becomes smaller going down the halogen group from HF to HI Describe these observationsarrow_forward3.) Draw the two possible Lewis structures for acetamide, H₂CCONH2. Calculate the formal charge on each atom in each structure and use formal charge to indicate the more likely structure. Label all bonds as being polar or nonpolar.arrow_forward
- Write Lewis structures for these compounds. Show all valence electrons. None of them contains a ring of atoms. (a) Hydrogen peroxide, H2O2 (b) Hydrazine, N2H4 (c) Methanol, CH3OHarrow_forwardA resonance hybrid is a structure that can be depicted by more than one valid Lewis structure. part1: Draw the major resonance form of fulminic acid, HCNO, with the atoms connected as indicated in the formula. Your structure should have nonzero formal charges minimized, and it should include all nonzero formal charges and all nonbonding electrons. part2: Draw the second most important resonance form of fulminic acid, HCNO, with the atoms connected as indicated in the formula. Your structure should have nonzero formal charges minimized, and it should include all nonzero formal charges and all nonbonding electrons. part3: Draw the least important resonance contributor for fulminic acid, HCNO, with the atoms connected as indicated in the formula. Your structure should have nonzero formal charges minimized and should include all nonzero formal charges and all nonbonding electrons.arrow_forwardThe two compounds nitrogen dioxide and dinitrogentetraoxide are introduced in Section 3.13.(a) NO2 is an odd-electron compound. Draw the bestLewis diagrams possible for it, recognizing that oneatom 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 octetrule. The two N atoms are bonded in this molecule.arrow_forward
- Show the possible resonance structures for nitrous oxide, N2O (the central atom is nitrogen). Indicate nonzero formal charges where they are present. Which resonance structure gives the best representation of this molecule?arrow_forwardWrite Lewis structures for the following: (c) C2F6 (contains a C¬C bond), (d) AsO3 3 -, (e) H2SO3 (H is bonded to O), (f) NH2Cl.. Arrange the bonds in each of the following sets in order of increasing polarity: (a) C¬F, O¬F, Be¬F; (b) O¬Cl, S¬Br, C¬P; (c) C¬S, B¬F, N¬O. What is the Lewis symbol for each of the following atoms or ions? (a) K, (b) As, (c) Sn2 + , (d) N3 Write electron configurations for the following ions and determine which have noble-gas configurations: (a) Cd2+, (b) P3-, (c) Zr4+arrow_forwardFor the phosphoric acid molecule (H3PO4), all four oxygen atoms are bonded to the central phosphorus atom and the three hydrogen atoms are bonded to different oxygen atoms. Several resonance structures can be drawn for H3PO4 but one structure is more important than the others. In the most important structure, the phosphorus atom has: a formal charge of +1 and a complete octet a formal charge of zero and a complete octet a formal charge of −1 and an expanded octet a formal charge of +5 and an expanded octet a formal charge of zero and an expanded octetarrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning