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?
Homework Answers
Thiazole, isoxazole, imidazole, and pyrazole are all more basic than pyrrole.
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The heterocyclopentadienes below contain more than one heteroatom. For each molecule, identify the orbitals occupied by...
please help in all sections asap!! Which type of electron is the highest in energy? An electron in an an...
please help in all sections asap!!
Which type of electron is the highest in energy? An electron in an anti-bonding molecular orbital. An electron in a bonding molecular orbital. An electron in an atomic orbital. O A non-bonding electron. Choose a systematic name for the following compound. 1,4 dimethyl ethyl benzene 1,4 diethyl methyl benzene 1,4-diisopropylbenzene 1,4 dipropylbenzene Answer the following questions. -OR Would you expect the above compound to be aromatic? Yes No Choose the correct explanations for the...
The example is saying it's not aromatic but how come 18.11d is aromatic ? TIC, OR...
The example is saying it's not aromatic but how come 18.11d is
aromatic ?
TIC, OR ANTIAROMATIC 18.2 DETERMINING WHETHER A STRUCTURE IS AROMATIC, NONAROMATIC, OR ANTIAR LEARN the skill Determine whether the following anion is aromatic, nonaromatic, or antiaromatc SOLUTION To determine if this anion is aromatic, we must ask two questions 1. Does the compound contain a ring comprised of continuously overlapping p orbitaid 2. Is there a Huckel number of π electrons in the ring? p orbital?...
please help in all sections asap! The following two drawings are resonance structures of one compound....
please help in all sections asap!
The following two drawings are resonance structures of one compound. a-o But the following two drawings are not resonance structures Not resonance structures They are, in fact, two different compounds. Choose the correct explanation(s). Select all that apply. Benzene does not have three C-C single bond and three C-C double bonds. In fact, all six C-C bonds of the ring have the same bond order and same length. Benzene have three C- single bond...
please help in all sections asap!! Which of the molecules below is the expected major product...
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Which of the molecules below is the expected major product of the following reduction? H3C- CH3 Lindlar's catalyst HH Х НАС CH₃ HiC CH₂ We were unable to transcribe this imagePRINT Choose the correct reagents listed in the table below. 1)NBS, heat 2)NaOEt b AICI Na, CH3OH Hz, Lindlar's catalyst NH3 Conc. H2SO4 H2O+ 03. МСРВА DMS Enter the correct letter for each step of the reaction in the boxes below. (Reagents cannot be...
1. Write the electron configurations and identify the number of valence electrons for each of the...
1. Write the electron configurations and identify the number of valence electrons for each of the following elements. oxygen sulfur nitrogen hydrogen fluorine phosphorus 2. Write name of the molecular geometry for each of the following molecules. a. A molecule with the central atom surrounded by three atoms and one lone pair. b. A molecule with a central atom surrounded by two doubly-bonded atoms. c. A molecule with a central atom surrounded by two singly-bonded atoms and two lone pairs....
Identify the more basic nitrogen atom in each molecule or pair of molecules below. Enter A...
Identify the more basic nitrogen atom in each molecule or pair
of molecules below. Enter A or B.
(A) (B) H (A) (B)"H N . (A)
A nucleophile resembles a Lewis base because both have electron pairs to donate. The more tightly...
A nucleophile resembles a Lewis base because both have electron pairs to donate. The more tightly held an electron lone pair, the more basic it is (see polarizability in this paragraph and Leaving Group Stability below). Nucleophiles tend to prefer to bond to carbon and bases to H. Charged atoms are more nucleophilic than uncharged atoms. Nucleophilicity is inhibited by crowding which decreases a nucleophile's strength, but bulkiness tends to make a base stronger. Increasing polarizability of electrons favors nucleophilicity....
please help in all sections asap!! Identify the reagents for each of the following transformations. Select...
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Identify the reagents for each of the following transformations. Select all that apply. V -a HC=CNa MCPBA NaOEt H2O2, NaOH NBS, heat Conc. H2S04, heat OBH3-THF OH PCC, CH2Cl2 Conc. H2SO4, heat OBH3-THF HC=CNa MCPBA H2O2, NaOH NBS, heat HCCNa ОМСРВА H2O2, NaOH PCC, CH2Cl2 Conc. H2SO4, heat The following two drawings are resonance structures of one compound. But the following two drawings are not resonance structures Not resonance structures They are, in fact,...
please help in all sections asap!!!! What is the major product of the following reaction sequence?...
please help in all sections asap!!!!
What is the major product of the following reaction sequence? 1) NBS (one equiv.), heat 2) t-BuOK The lone pairs on pyrimidine (structure below) are not delocalized because of which factor? The lone pairs are in sp orbitals. The lone pairs are in sp orbitals. The lone pairs are in orbitals at 90 degrees to the pi system. None of the above. Choose the five different acceptable IUPAC names for the following compound. meta-dimethylbenzene...
2. For each of the following. (l) draw a Lewis diagram for the molecule. (it) count the number of elec tron groups...
2. For each of the following. (l) draw a Lewis diagram for the molecule. (it) count the number of elec tron groups around the central atom and the number of bonded electron groups, (ii) draw a three- dimensional representation of the molecule, (iv) give the values of the ideal bond angles, give the name of the electron-pair and molecular geometries, and (w) give the hybridization of the cen- tral atom. Example: NH, H-N-H H One non-bonding lone pair on N,...
please help in all sections asap!!
Which type of electron is the highest in energy? An electron in an anti-bonding molecular orbital. An electron in a bonding molecular orbital. An electron in an atomic orbital. O A non-bonding electron. Choose a systematic name for the following compound. 1,4 dimethyl ethyl benzene 1,4 diethyl methyl benzene 1,4-diisopropylbenzene 1,4 dipropylbenzene Answer the following questions. -OR Would you expect the above compound to be aromatic? Yes No Choose the correct explanations for the...
The example is saying it's not aromatic but how come 18.11d is
aromatic ?
TIC, OR ANTIAROMATIC 18.2 DETERMINING WHETHER A STRUCTURE IS AROMATIC, NONAROMATIC, OR ANTIAR LEARN the skill Determine whether the following anion is aromatic, nonaromatic, or antiaromatc SOLUTION To determine if this anion is aromatic, we must ask two questions 1. Does the compound contain a ring comprised of continuously overlapping p orbitaid 2. Is there a Huckel number of π electrons in the ring? p orbital?...
please help in all sections asap!
The following two drawings are resonance structures of one compound. a-o But the following two drawings are not resonance structures Not resonance structures They are, in fact, two different compounds. Choose the correct explanation(s). Select all that apply. Benzene does not have three C-C single bond and three C-C double bonds. In fact, all six C-C bonds of the ring have the same bond order and same length. Benzene have three C- single bond...
please help in all sections asap!!
Which of the molecules below is the expected major product of the following reduction? H3C- CH3 Lindlar's catalyst HH Х НАС CH₃ HiC CH₂ We were unable to transcribe this imagePRINT Choose the correct reagents listed in the table below. 1)NBS, heat 2)NaOEt b AICI Na, CH3OH Hz, Lindlar's catalyst NH3 Conc. H2SO4 H2O+ 03. МСРВА DMS Enter the correct letter for each step of the reaction in the boxes below. (Reagents cannot be...
Identify the more basic nitrogen atom in each molecule or pair
of molecules below. Enter A or B.
(A) (B) H (A) (B)"H N . (A)
A nucleophile resembles a Lewis base because both have electron pairs to donate. The more tightly held an electron lone pair, the more basic it is (see polarizability in this paragraph and Leaving Group Stability below). Nucleophiles tend to prefer to bond to carbon and bases to H. Charged atoms are more nucleophilic than uncharged atoms. Nucleophilicity is inhibited by crowding which decreases a nucleophile's strength, but bulkiness tends to make a base stronger. Increasing polarizability of electrons favors nucleophilicity....
please help in all sections asap!!
Identify the reagents for each of the following transformations. Select all that apply. V -a HC=CNa MCPBA NaOEt H2O2, NaOH NBS, heat Conc. H2S04, heat OBH3-THF OH PCC, CH2Cl2 Conc. H2SO4, heat OBH3-THF HC=CNa MCPBA H2O2, NaOH NBS, heat HCCNa ОМСРВА H2O2, NaOH PCC, CH2Cl2 Conc. H2SO4, heat The following two drawings are resonance structures of one compound. But the following two drawings are not resonance structures Not resonance structures They are, in fact,...
please help in all sections asap!!!!
What is the major product of the following reaction sequence? 1) NBS (one equiv.), heat 2) t-BuOK The lone pairs on pyrimidine (structure below) are not delocalized because of which factor? The lone pairs are in sp orbitals. The lone pairs are in sp orbitals. The lone pairs are in orbitals at 90 degrees to the pi system. None of the above. Choose the five different acceptable IUPAC names for the following compound. meta-dimethylbenzene...
2. For each of the following. (l) draw a Lewis diagram for the molecule. (it) count the number of elec tron groups around the central atom and the number of bonded electron groups, (ii) draw a three- dimensional representation of the molecule, (iv) give the values of the ideal bond angles, give the name of the electron-pair and molecular geometries, and (w) give the hybridization of the cen- tral atom. Example: NH, H-N-H H One non-bonding lone pair on N,...
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