Substitution Reaction of Molybdenum Hexacarbonyl: the Use of Infrared Spectroscopy as a Structural Tool in Metal Carbonyl Chemistry.

758 WordsApr 13, 20134 Pages
School of Chemistry @ Pietermaritzburg University of KwaZulu Natal Chemistry 310 Substitution reaction of Molybdenum Hexacarbonyl: the use of infrared spectroscopy as a structural tool in metal carbonyl chemistry. Abstract The synthesis of isomer A and B of [Mo(CO)4(PPh3)2] were prepared from molybdenum hexacarbonyl, sodium borohydride and triphenylphosphine with a % yield of 79% and 8.5% respectively. Two isomer was identified using IR spectra and from isomer A four C≡O stretching was observed, while in isomer B only one C≡O stretching was observed in a frequency ranged of (1867.24- 2024,39 cm-1) and 1880.91 cm-1 through this results isomer A concluded to be cis and B to be trans isomer . Results…show more content…
| | |% Yield = (Mass Produced/Theoretical Mass) × 100 | | |= (1.102 g ÷ 1.387g) × 100 | | |= 79 % | | | | | Table 1: Infrared spectra measure the data for Isomer A and B(nujol mulls) |Isomer |Frequency cm-1 |Assignment | |A |1867.24 |CO | | |1886.48 |CO | | |1919.66 |CO | | |2024.39

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