Gas-phase ion chemistry of Ti(O-<i>i</i>-Pr)<sub>4</sub>
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Bibliographic record
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 additionelimination reaction. The nature of the fragment ion and the ensuing ionmolecule 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 alkoxidefluoride exchanges with BF 3 leading to the eventual formation of TiF 5 .Key words: titanium tetraisoproxide, gas-phase ion chemistry, hypervalent Ti, ionmolecule reactions, IRMPD.
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Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
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