Spawning Error..

Hello to everyone..

I have got a following scripts :

 // Erdem Köşk
 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 public class Spawner : MonoBehaviour
 {
 
 
     private GameObject[] enemySpawnPoints;
     List<Transform> iList = new List<Transform>();
     public GameObject[] items;
     public GameObject enemy;
     public GameObject allied;
     public GameObject bonus;
     public float spawnTime;
   //  public float destroyTime; 
     bool duplicatePos;
     bool isAdded;
 
     void spawn()
     {
 
         int spawn1;
         int kind;
         GameObject randomEnemySpawn;
         GameObject randomitem;
         do
         {
             spawn1 = Random.Range(0, enemySpawnPoints.Length - 1);
             kind = Random.Range(0, items.Length - 1);
             randomEnemySpawn = enemySpawnPoints[spawn1];
             randomitem = items[kind];
 
             if (iList.Count == 0)
             {
                 iList.Add(randomEnemySpawn.transform);
                 break;
             }
             else
             {
                 foreach (Transform spawn in iList)
                 {
 
                     if (spawn.Equals(randomEnemySpawn.transform))
                     {
                         duplicatePos = true;
                         break;
 
                     }
                 }
                 if (!duplicatePos)
                 {
                     iList.Add(randomEnemySpawn.transform);
                     break;
 
                 }
 
                 duplicatePos = false;
 
 
             }
 
         } while (true);
 
 
         GameObject clone = (GameObject)Instantiate(randomitem, randomEnemySpawn.transform.position, randomEnemySpawn.transform.rotation);
         if (iList.Count >= 5)
         {
             iList.RemoveAt(0);
         }
         //iList.Remove(clone.transform);
      //   clone.transform.parent = parentObject.transform;
 
       //  Destroy(clone, destroyTime);
         //isAdded = false;
         duplicatePos = false;
 
 
 
     }
     // Use this for initialization
     void Start()
     {
         items = new GameObject[4];
         items[0] = enemy;
         items[1] = allied;
         items[2] = bonus;
         InvokeRepeating("spawn", 1, spawnTime);
         enemySpawnPoints = GameObject.FindGameObjectsWithTag("Spawn");
     }
 
     // Update is called once per frame
     void Update()
     {
 
     }
 
 }

This code provide spawining items. And items dont spawn duplicated. Hovewer ı want to send a raycast to spawned item. İt hits a collider this items dont be destroy. And this Script dont spawn any items to items position. How can change my code .. This code take a colliders. But my ıtems have got a colliders to so ı cannot reach this coordinates