If the number of `sigma and pi` bonds in vinyl acetate are x and y respectively. What is the sum of `x+y`?

Answer

To determine the number of sigma (σ) and pi (π) bonds in vinyl acetate and find the sum of these bonds (x + y), we will follow these steps:

### Step 1: Write the Structure of Vinyl Acetate
Vinyl acetate has the molecular formula C4H8O2. The structure can be represented as follows:

```
O
||
H2C=C
|
C
/ \
H O
|
CH3
```

### Step 2: Identify the Bonds
In the structure of vinyl acetate, we need to identify the types of bonds present:

1. **C=C double bond**: This contains 1 sigma bond and 1 pi bond.
2. **C-O double bond**: This also contains 1 sigma bond and 1 pi bond.
3. **C-H bonds**: Each carbon atom is bonded to hydrogen atoms through sigma bonds.

### Step 3: Count the Sigma Bonds
Now, let's count the sigma bonds:

- From the C=C double bond: 1 sigma bond
- From the C=O double bond: 1 sigma bond
- Each carbon atom (C) is bonded to hydrogen (H) atoms:
- The first carbon (C1) has 2 H atoms: 2 sigma bonds
- The second carbon (C2) has 1 H atom: 1 sigma bond
- The third carbon (C3) has 1 H atom: 1 sigma bond
- The fourth carbon (C4) has 3 H atoms: 3 sigma bonds

Now, let's sum these up:
- C=C double bond: 1 sigma
- C=O double bond: 1 sigma
- C1-H bonds: 2 sigma
- C2-H bond: 1 sigma
- C3-H bond: 1 sigma
- C4-H bonds: 3 sigma

Total σ bonds = 1 + 1 + 2 + 1 + 1 + 3 = 9 σ bonds

### Step 4: Count the Pi Bonds
Next, we count the pi bonds:
- From the C=C double bond: 1 pi bond
- From the C=O double bond: 1 pi bond

Total π bonds = 1 + 1 = 2 π bonds

### Step 5: Calculate x + y
Now we have:
- x (number of σ bonds) = 9
- y (number of π bonds) = 2

Thus, the sum x + y = 9 + 2 = 11.

### Final Answer
The sum of the number of sigma and pi bonds in vinyl acetate (x + y) is **11**.

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