Journal of the Chemical Society. Perkin transactions II p. 1627 - 1632 (1988)
Update date:2022-08-03
Topics:
Grabowski, Joseph J.
Roy, Paul D.
Leone, Robert
Gas-phase acidity of trimethylphosphine has been investigated at ambient temperature by examining proton-transfer reactions in 40 Pa of helium buffer gas in a Flowing Afterglow instrument.On the basis of the occurence-non-occurence of a number of proton-transfer reactions and the observation of rapid H-D exchange between D2O and the conjugate base of trimethylphosphine, it has been determined that trimethylphosphine is more acidic than water.Quantitative measurements are reported for the reaction of trimethylphosphine with atomic oxygen anion and methoxide.These latter two anions exhibit multiple reaction pathways, one of which is proton transfer.From measurements of the rate coefficients of these two reactions and the relative product yields, it is concluded that the gas-phase acidity of trimethylphosphine is very similar to that of the hydroxyl radical; the recommended value is ΔGoacid(PMe3) 1577 +/- 13kJ mol-1.The derived acidity measurement is in slight contrast to recent theoretical and experimental estimates.Furthermore, it is found that anions which react only slowly with trimethylphosphine by proton transfer can undergo an alternative reaction which corresponds to addition of the neucleophilic anion to trimethylphosphine followed by loss of methane.
View MoreHangzhou Taiyan Trading Co., Ltd(expird)
Contact:+86-13777583958
Address:NO.63, Xingyi Street, Xihu District, Hangzhou, Zhejiang, China
Yantai Derun Liquid Crystal Materials Co. Ltd.
website:http://www.ytderun.com
Contact:86-535-6300169
Address:ROOM 90, XIANGFU STREET, FUSHAN NEW-HIGH-TECH IDUSTRY ZONE, YANTAI
Shanghai Egoal Chemical Co.,Ltd
Contact:+86-21-50333091
Address:Yangming Garden Square 3,YangGao North Road 1188, Pudong New District, Shanghai
Shanghai PotentPharm Science and Technology Co.,Ltd
Contact:86-021-51969655
Address:Unit B, Building 18, No.300, Chuantu Rd,Pudong District, Shanghai 201202, China
Hangzhou innopharma technology Co,.Ltd.(expird)
Contact:+86-13388601988
Address:Room845,lixin building, moganshan road, hangzhou, china
Doi:10.1021/ic060347o
(2006)Doi:10.1016/S0960-894X(00)00547-3
(2000)Doi:10.1021/ja00144a014
(1995)Doi:10.1002/chem.201704554
(2018)Doi:10.1080/00397911.2019.1691738
(2020)Doi:10.1016/j.tetlet.2011.03.036
(2011)
