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• W2084574337 abstract "The positive and negative gas-phase ion chemistry of Ti(O-i-Pr) 4 was investigated at low pressures by FT-ICR. The fragment ion, (i-PrO) 3 Ti-O + =C(H)Me, reacts with the parent neutral by proton transfer and by a nucleophilic addition–elimination reaction. The nature of the fragment ion and the ensuing ion–molecule reactions clearly indicate that Ti(O-i-Pr) 4 exists as a monomer in the gas phase. In the negative ion mode, F – was found to react easily with Ti(O-i-Pr) 4 to yield the pentacoordinated complex FTi(O-i-Pr) 4 – ion. This hypervalent Ti species undergoes a series of sequential fragmentations induced by IR multiphoton excitation. The first step is unusual because two channels are observed by IRMPD: one involves loss of HF, and the other loss of i-PrOH. The subsequent dissociation processes are characterized by progressive elimination of propene giving rise to a number of different titanaoxirane-containing anions with the general formula [(η 2 -CMe 2 O)Ti(OH) 3– n (i-PrO) n ] – . FTi(O-i-Pr) 4 – was also observed to undergo multiple alkoxide–fluoride exchanges with BF 3 leading to the eventual formation of TiF 5 – .Key words: titanium tetraisoproxide, gas-phase ion chemistry, hypervalent Ti, ion–molecule reactions, IRMPD." @default.
• W2084574337 created "2016-06-24" @default.
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• W2084574337 date "2005-11-01" @default.
• W2084574337 modified "2023-10-10" @default.
• W2084574337 title "Gas-phase ion chemistry of Ti(O-<i>i</i>-Pr)₄" @default.
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• W2084574337 doi "https://doi.org/10.1139/v05-202" @default.
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