Interpretation:
The following questions regarding 1,3,5-cycloheptatriene are to be answered:
a) How many p atomic orbitals are present in 1,3,5-cycloheptatriene. b) How many molecular orbitals describe this conjugated system. c) How many are bonding molecular orbitals. d) How many are anti-bonding molecular orbitals e) Which molecular orbitals are filled with electrons. f) If this molecule absorbs a photon of UV light, between which two molecular orbitals the electron will move.
Concept introduction:
When atomic orbitals overlap among themselves equal number of molecular orbitals, bonding and anti-bonding, are produced. Electrons occupy the molecular orbitals following Auf bau, Pauli’s exclusion principle and Hund’s rule. When the molecule absorbs a photon of UV light, the electron will move from the highest occupied molecular orbital (HOMO) to lowest unoccupied molecular orbital (LUMO).
To answer:
The questions a) How many p atomic orbitals are present in 1,3,5-cycloheptatriene.b) How many molecular orbitals describe this conjugated system. c) How many are bonding molecular orbitals. d) How many are anti-bonding molecular orbitals e) Which molecular orbitals are filled with electrons. f) If this molecule absorbs a photon of UV light, between which two molecular orbitals the electron will move.
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Chapter 14 Solutions
Organic Chemistry
- What orbitals are used to form each highlighted bond in the following molecule? In what type of orbital do the lone pairs on each O and N reside?arrow_forwardWhich I molecular orbital represents the ground state HOMO of 1,3,5-hexatriene? Click on a letter A to D to answer. A Barrow_forward6arrow_forward
- Answer the following questions for 1,3,5- hexatriene, the conjugated triene containing six carbons.Which MOs are bonding? Which are antibonding?arrow_forward1. (a) Provide a name for each molecule (I narrowed it down to three subparts)arrow_forwardSection 7.3 shows that the compound 2-butene exists intwo isomeric forms, which can be interconverted only bybreaking a bond (in that case, the central double bond).How many possible isomers correspond to each of the following chemical formulas? Remember that a simple rotation of an entire molecule does not give a different isomer.Each molecule contains a central CuC bond.(a) C2H2Br2(b) C2H2BrCl(c) C2HBrClFarrow_forward
- 2. Use the Newman projection to identify the structure shown: (a) as a Fischer projection (b) as a bond-line structure (c) by name Circle your answer for each part. CH2CH3 F+ H CH(CH3)2 CH2CH3 H+ F CH(CH3)2 三F H CH2CH3 H H F no CH(CH3)2 geslaan sam o Y (S)-4-fluoro-2-methylhexane F (R)-4-fluoro-2-methylhexanearrow_forward(a) Draw the molecular orbital picture for propa-1,2-diene, H2C=C=CH2. Hint: The three-dimensional geometry is shownin the chapter. (b) Draw the MO energy diagram for propa-1,2-diene. What is the HOMO? What is the LUMO?arrow_forwardhe structure of 1,2-propadiene (allene) is shown to the right. Q.)Explain the three-dimensional geometry of allene in terms of the orbitals usedarrow_forward
- Draw all possible structural (constitutional and cis-trans) isomers in bond-line presentations for the following compounds: A) C4H9Br (4 isomers) B) C3H7N (non cyclic compounds only) (at least 8 isomers including stereoisomers). C) C2H4F2 (not that many possibilities) D) C4H10O (7 isomers) E) C3H6O (compounds with single bonds only) (3 isomers) F) F2CCH2 (pay attention that the connectivity in this compound is already defined) G) C2H2Br2 (3 isomers including stereoisomers)arrow_forwardCircle the most basic atom or group of atoms in each of the following molecules:arrow_forwardWhy is the bond-line drawing of the allylic cation shown below insufficient? O (+) The two electrons in the pi bond are delocalized into the adjacent p-orbital and are thus associated with three atom spread out over two locations. Neither of these attributes is depicted by this bond-line drawing. Carbon only has six electrons in its valence shell, and that is not allowed. Bond-line drawings need to have hydrogen atoms drawn in. There are four delocalized electrons spread over three atoms, which is not depicted by this bond-line drawing.arrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning