Concept explainers
16-6 Answer true or false.
- te/7-Butylamine is a 3°
amine .
(a)
Interpretation:
To analyse whether the given statement: tert-Butylamine is
Concept Introduction:
Amines are the derivatives of ammonia, wherein one or more than one hydrogen atoms are substituted by an alkyl or aryl group.
The amines are categorized as primary, secondary or tertiary based on the number of carbon atoms that are bonded directly to the nitrogen atom. Primary amine has only one carbon atom bonded to the nitrogen atom. Similarly, secondary amines have two carbon groups bonded to the nitrogen, and tertiary amines nave three carbon groups bonded to the nitrogen.
Answer to Problem 16.6P
The statement is false.
Explanation of Solution
The structure of a tert-butylamine is given below:
In a tert-butylamine, the carbon atom is bonded to three methyl groups, while nitrogen is attached to only one carbon group. Therefore, the tert-butyl amine is a primary amine. Therefore, this statement is false.
(b)
Interpretation:
To analyse whether the given statement about the aromatic amine is true or not.
Concept Introduction:
Amines are the derivatives of ammonia, wherein one or more than one hydrogen atoms are substituted by an alkyl or aryl group.
The amines are categorized as primary, secondary or tertiary based on the number of carbon atoms that are bonded directly to the nitrogen atom. Primary amine has only one carbon atom bonded to the nitrogen atom. Similarly, secondary amines have two carbon groups bonded to the nitrogen, and tertiary amines nave three carbon groups bonded to the nitrogen.
Answer to Problem 16.6P
The statement is true.
Explanation of Solution
If in an amine, the nitrogen is directly bonded to one or more aryl groups or aromatic rings, and then the amine is known as an aromatic amine.
For example, aniline is an aromatic amine, as it is attached to one aromatic ring benzene. The structure of aniline is given below:
Therefore, the given statement is true.
(c)
Interpretation:
To analyse whether the given statement: In a heterocyclic amine, the main nitrogen is the part of the ringis true or not.
Concept Introduction:
Amines are the derivatives of ammonia, wherein one or more than one hydrogen atoms are substituted by an alkyl or aryl group.
The amines are categorized as primary, secondary or tertiary based on the number of carbon atoms that are bonded directly to the nitrogen atom. Primary amine has only one carbon atom bonded to the nitrogen atom. Similarly, secondary amines have two carbon groups bonded to the nitrogen, and tertiary amines nave three carbon groups bonded to the nitrogen.
Answer to Problem 16.6P
The statement is true.
Explanation of Solution
In a heterocyclic amine, the carbon group of the ring structure is replaced by the nitrogen atom. For example, in pyridine, the nitrogen atom replaces one —CH group of the benzene ring.
Thus, the heterocyclic amine is an amine in which nitrogen is one of the atoms of a ring. Therefore, this statement is true.
(d)
Interpretation:
To analyze whether the given statement: The NH4+ and CH4have the same number of valence electrons and both have tetrahedral geometry as per the VSEPR model is true or not.
Concept Introduction:
The VSEPR (Valence-shell electron pair repulsion) model predicts the shape of the molecules or ions by identifying the position of atoms connected to the central atom.
Answer to Problem 16.6P
The statement is true.
Explanation of Solution
The valence shell electron pair repulsion (VSEPR) theory determines the shapes and the geometry of a molecule. In a CH4 molecule, one carbon atom is bonded to four hydrogen atoms with a single bond. In NH4+, one nitrogen atom is singly bonded to four hydrogen atoms.
According to the VSEPR model, each bond represents a pair of electrons. Since both compounds have four bonds around the central atom, they contain eight valence electrons. Also, according to the VSEPR model, these four bonding regions are arranged in a tetrahedral manner so that they are as far away from one another as possible, giving the molecule a tetrahedral geometry. Therefore, this statement is true.
(e)
Interpretation:
To analyze whether the given statement: There are four constitutional isomers with the molecular formulaC3H9N, is true or not.
Concept Introduction:
Constitutional isomers are those compounds which have same molecular formula, but they differ in the arrangement of atoms in the molecules.
Answer to Problem 16.6P
The statement is true.
Explanation of Solution
The molecular formula is given as C3H9N. Therefore, the possible constitutional isomers for this molecular formula are given below:
Thus, there are four constitutional isomers possible with the molecular formula C3H9N. Therefore, this statement is true.
Want to see more full solutions like this?
Chapter 16 Solutions
Introduction to General, Organic and Biochemistry
- Account for the fact that one carboxyl group is a considerably stronger acid than the other carboxyl group.arrow_forwardThe five parts of question 16 relate to the following three molecules: N-H А в с A (a) Which of the three molecules above are structural isomers? (b) Which of the molecules contains a carbon with linear geometry? (c) Which molecule contains a tertiary amine? (d) Which molecule only contains sp³ hybridized atoms (not including hydrogen)? (e) Which molecule is chiral? Circle the stereocentre in this molecule.arrow_forwardIs this correct?arrow_forward
- Both A) C=0 group and E) -C(=O) NH2 group is incorrect. Please help me.arrow_forwardDirections: Write the correct Lewis structure and show the step-by-step solution on how you came up with the structure. HCN - highly toxic conjugate acid of a cyanide that is used as a chemical weapon agentarrow_forwardThe following molecular formulas represent saturated amine compounds or unsaturated amine compounds that contain C=C bonds. Determine whether each compound is saturated and how many C=C bonds are present. a C,H1N This amine is c and contains C=C bond(s). b C,H12N2 correct lamine is and contains C-C bond(s). € CH,N This amine is and contains C=C bond(s).arrow_forward
- The normal pH range for blood plasma is 7.35–7.45. Under these conditions, would you expect the carboxyl group of lactic acid (pKa 3.08) to exist primarily as a carboxyl group or as a carboxylic anion? Explain.arrow_forwardOrganic chemistry : Amine Please GIVE the names of the following amines and CLASSIFY them as primary, secondary or tertiary like in the pictures below from (a) until (j) BY TODAY ASAParrow_forward3. For the following acid - base reaction, (a) predict the products; (b) identify the Bronsted acid, Bronsted base, conjugate acid, and conjugate base; (c) use curved arrows to show the flow of electron pairs in the reaction. CH3 CH2C-OH + NaNHaarrow_forward
- What is the meaning of the term tertiary (3°) when it is used to classify amines? Draw a structural formula for the one tertiary (3°) amine known as Hünig’s base (N,N-diisopropylethylamine).arrow_forwardWhich of the following are examples of isobars? S-40 & CI-40 S-32 & P-31 Na-37 & K-39 C-12 & C-14arrow_forward1. Use the image provided to answer the question in detail: a) Two of the earliest drug molecules featured in Chapter 8 are Vicodin and Heroin, whose chemical structures are very similar. Both of these molecules contain an amine functional group and several rings. Indicate the number of aromatic rings in each structure, and identify the amine functional group in each molecule as primary, secondary, or tertiary.arrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning