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When the complex Mn(CO)5Br is reacted with methyllithiumin tetrahydrofuran,
White percipitate formation is due to the LiBr compound .IR region between 2070- 19 90 (m' represent a triple bond betweencarbon and oxygen , where the carbon atom has been bonded to a metalatom. 3300 (mil - 2800 (mil region represent the presence of C-H( sp) hybridization stretch.LiBr compound is formed when the Li reacts with the bromide ion in thecomplex compound . LiBr compounds are insoluble in water .The reason why (-H bands appear more significantly than C O bond isbecause of the increase in dipole moment variation . Due to the variationof the dipole moment , it causes an increase in stretching rate , thisusually clarity the position of the spectra which have higher band result .. ( - ): BY :COCOOC : MnBY+Me - LiMe- MnCO10 coI COCO+ LiBy