Unity Projectile Collision Detection

void OnTriggerEnter(Collider col)
    {
        if (!collided)
        {
            collided = true;
            Explode();
        }
    }

    void Explode()
    {
        Debug.Log("Collision Detected");
        Debug.Log("PlayingSound");
        gameObject.GetComponent<Rigidbody>().velocity = Vector3.zero;
        explosion.Play();
        StartCoroutine(waitForExplosion());

    }

    IEnumerator waitForExplosion()
    {
        Debug.Log("Waiting for sound to play");
        yield return new WaitWhile(()=> explosion.isPlaying);
        GameObject[] enemies = GameObject.FindGameObjectsWithTag("Enemy");
        foreach (GameObject Enemy in enemies)
        {
            if (damageRadius >= Vector3.Distance(transform.position, Enemy.transform.position))
            {
                //Enemy.getComponent(HealthScript).takeDamage(100);
                Debug.Log("Max Damage!");
            }
        }
        Debug.Log("Destroying");
        Destroy(gameObject);
    }