Multiple choice Which of the following compounds shows MLCT transfer? HgO CdS Pb3(SbO4)2 [Ru(2, 2bipyridyl)3] None of these Reveal answer Fill a bubble to check yourself D Correct answer Explanation This option is correct because the compound [Ru (2, 2 bipyridyl) 3] shows MLCT due to the metal electron transfer to the pi antibonding molecular orbital of ligand. It is produced orange in colour.