You cannot take the assets from your existing IRA and then use them to purchase other assets and then purport to rollover those new assets into the same or new IRA. Simply put, for any rollover to stand, it must be made up of the same assets/property.
Any portion of the distribution from an IRA that is used to purchase other assets before the rollover is complete is treated as a withdrawal; and hence taxed at the normal rate. A 10 percent early withdrawal fee will also be charged on that portion of the distribution if you are younger than 59½ years.