1-phenylhepta-1,3,5-triyne
What is:
1.The total number of σ-bonds
2. The total number of π-bonds
Can you explain it please?
1 4
2 3
To determine the total number of σ-bonds and π-bonds in the compound 1-phenylhepta-1,3,5-triyne, we need to understand the structure and bonding present.
1. The total number of σ-bonds:
A σ-bond is formed by the direct overlap of atomic orbitals along the bonding axis. In this compound, each carbon atom is bonded to other atoms via single covalent bonds. Since there are 7 carbon atoms, each forming 4 single bonds, there are a total of 28 σ-bonds (7 carbon atoms x 4 σ-bonds per carbon).
2. The total number of π-bonds:
A π-bond is formed by the sideways overlap of p-orbitals perpendicular to the bonding axis. In this compound, the presence of triple bonds (-C≡C-) suggests the presence of π-bonds.
The name of the compound, "1-phenylhepta-1,3,5-triyne," indicates that there is one phenyl group (-C6H5) attached to the 1st carbon atom, and the triple bonds are present at the 1st, 3rd, and 5th carbon atoms.
Since each triple bond consists of one σ-bond and two π-bonds, there are a total of 3 π-bonds (1 triple bond x 3 triple bonds).
In summary:
1. The total number of σ-bonds is 28.
2. The total number of π-bonds is 3.
To determine the total number of σ-bonds and π-bonds in 1-phenylhepta-1,3,5-triyne, it's important to understand the concept of sigma (σ) and pi (π) bonds in organic chemistry.
1. σ-bonds: Sigma (σ) bonds are formed by the overlapping of two atomic orbitals along the internuclear axis. These bonds allow the rotation of atoms around the bond axis. Each single bond, whether it is a carbon-carbon or carbon-hydrogen bond, is a σ-bond.
2. π-bonds: Pi (π) bonds, on the other hand, are formed by the parallel overlap of two p-orbitals perpendicular to the internuclear axis. They are usually seen in multiple bonds, such as double bonds and triple bonds. Pi bonds restrict the rotation of atoms around the bond axis.
Now, let's analyze the structure of 1-phenylhepta-1,3,5-triyne:
- "Phenyl" refers to a phenyl group (C6H5- or C6H5-).
- "Hepta" indicates seven carbon atoms, so the molecule contains a chain of seven carbon atoms (C-C-C-C-C-C-C).
- "Triyne" suggests that there are three alkynes in the molecule.
Considering all this information, we can construct the structure of 1-phenylhepta-1,3,5-triyne:
C - C - C - C - C - C - C
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Phenyl
Since each carbon atom forms four σ-bonds (one to the left, one to the right, one to above, one to below), we can determine the number of σ-bonds. In this case, there are 7 carbon atoms, so there are 7 × 4 = 28 σ-bonds in total.
In terms of π-bonds, each triple bond in the alkynes contains two π-bonds. Considering that there are three alkynes in 1-phenylhepta-1,3,5-triyne, we can calculate the number of π-bonds as 3 × 2 = 6 π-bonds in total.
To summarize:
1. The total number of σ-bonds in 1-phenylhepta-1,3,5-triyne is 28.
2. The total number of π-bonds in 1-phenylhepta-1,3,5-triyne is 6.
Remember, to determine the number of σ-bonds and π-bonds in a molecule, it is essential to understand the nature of sigma and pi bonds and carefully analyze the structure of the compound.