K mesures So, this is our hydrogen, hydrogen, hydrogen and again hydrogen. So, this is the structure of B2H6, diborin. Okay, this is generally called as the three center to electron bond is called as banana bond. Banana bond. So, in that these are terminal hydrogen are 4, 1, 2, 3, 4, remaining 2 hydrogen atas rainbow plane and below plane. Okay, and next one this B2H6 preparation. So, the diborin preparation. The preparation of diborin in laboratory when on the boron type flow ride that is B of 3, is passed through lithium aluminum hydride. It forms B2H6 diborin plus lithium flow ride. Next, aluminum flow ride is formed. So, means the boron tri-flow ride is reactor with lithium aluminum hydride produced diborin. This is the one preparation. Another preparation is the sodium hydride. Sodium borohydride is reacted with iodine. It forms diborin plus next one. Sodium iodide is formed. Anyplace I minus sodium iodide. And so, this is your preparation method of diborin. Means that diborin is prepared from boron tri-flow ride is reacted with lithium aluminum hydride or sodium borohydride is reacted with iodine. It also gives diborin product. This diborin is undergoes SP3 hybridization. Okay, and next this diborin. So, very important reaction. The diborin is reacted with ammonium. It forms unheating. It forms a crystallization product. That is B2H6 2 NH3 is formed. The diborin is reacted with ammonia. Insially forms B2H6 2 NH3. Unfother heating and further heating. At higher temperature, it forms B3N3H6. This is called as borajol. B2H6 2 NH3. Diabolium. And strongly heating, it forms borajol. That borajol general formula is B3N3H6. This borajol is generally called as inorganic benzene. So, the organic benzene is formed by C6H6. The inorganic benzene formula is B3N3H6. That is called as borajol. And next one. So, these are the important characteristics of boron compounds which are existant in borax, heartoboric acid and diborin. So, these are very important. One, here two types of bonds. One is BH bond and one is BHB bond. This BHB bond exists as 3 centred to electron bond. BH bond is 2 centred to electron bond. 4 hydrosens are terminal hydrosens. 2 hydrosens are aevo and below hydrosens. It is involved in preparation. So, this is your 13th group elements or 3rd day group elements. In this group, except boron remaining are different metals are shows different characteristics. Boron forms, colon compounds remaining are forms, ionic nature. Those are easily soluble in water. This is an insoluble in water. It is a Lewis acid that Lewis acid is reacted with Lewis base.