Each cyclic structure shown below contains a heteroatom that has lone-pair electrons. For each structure, answer...
Each cyclic structure shown below contains a heteroatom that has lone-pair electrons. For each structure, answer the following questions: Are the lone-pair electrons delocalized? Is the structure aromatic?
Draw a structure showing an aromatic resonance form, Include formal charges and lone pair electrons on the oxygen atom.
Draw a structure showing an aromatic resonance form. Include formal charges and lone pair electrons on the oxygen atom. 6. 6
The heterocyclopentadienes below contain more than one heteroatom. For each molecule, identify the orbitals occupied by each lone pair and determine whether the molecule is aromatic. For the sulfur and oxygen, two sets of lone pairs will each be in a different orbital, so place 2 orbitals in the box. Which heterocycles are more basic than pyrrole? pyrazole imidazole thiazole isoxazole Aromatic or not? aromatic) non-aromaticsp 2
Which of the following compounds contains exactly one unshared pair of valence electrons? An unshared pair of valence electrons is another name for a lone pair or non-bonding pair. (hint: you'll have to draw the Lewis structure of each molecule to answer this question) A) SiH4 B) C2H4 (contains no unshared pairs of electrons) C) H2S D) PH3
For each of the species below, identify any cyclic conjugated system, then: A. Determine the number of electrons in a system of cyclic conjugation (zero if no cyclic conjugation). B. Specify whether the species is "a"-aromatic, "aa"-anti-aromatic, or "na"-non-aromatic (neither aromatic nor anti-aromatic). (Presume rings to be planar unless structure obviously prevents planarity. If there is more than one conjugated ring, count electrons in the largest.) A.Electrons in a cyclic conjugated system. B.The compound is (a, aa, or na) .
For the structure below, determine the total number of ? electrons and the number of ? electrons delocalized in the ring. Indicate whether the compound is aromatic, nonaromatic, or antiaromatic. Assume the structure is planar. For the structure below, determine the total number of Pi electrons and the number of Pi electrons delocalized in the ring. Indicate whether the compound is aromatic, nonaromatic, or antiaromatic. Assume the structure is planar.
1. Answer the following questions for the acetamide molecule (CH3CONH2). (Lone pair electrons are not shown.) (a) Determine the electron-pair and molecular geometry for each carbon and nitrogen atom in the molecule. Determine the C-C-O and C-N-H bond angles. (b) Determine the hybridization of each carbon and nitrogen atom in the molecule. (c) Use the valence bond theory to describe the C-C, C-O, and C-N bonds in the molecule.
For the structure below, determine the total number of T electrons and the number of electrons delocalized in the ring. Indicate whether the compound is aromatic, nonaromatic, or antiaromatic Assume the structure is planar Total number of π electrons Number Number of electrons delocalized in the ring Number The compound is O aromatic O nonaromatic O antiaromatic
For each of the species below, identify any cyclic conjugated system, then: A. Determine the number of electrons in a system of cyclic conjugation (zero if no cyclic conjugation). B. Specify whether the species is "a"-aromatic, "aa"-anti-aromatic, or "na"-non-aromatic (neither aromatic nor anti-aromatic). (Presume rings to be planar unless structure obviously prevents planarity. If there is more than one conjugated ring, count electrons in the largest.) осна A.Electrons in a cyclic conjugated system. B.The compound is (a, aa, or na)...