Retention Behavior of Hydrazine Derivatives in HILIC Mode

2011 ◽  
pp. 309-344
Author(s):  
Juris Hmelnickis ◽  
Igors Susinskis ◽  
Kaspars Kokums
Keyword(s):  
Retention Behavior ◽  
Hydrazine Derivatives

Study of the lipophilicity and retention behavior of some s-triazine derivatives on aminoplast and cellulose

2001 ◽  
Vol 14 (4) ◽  
pp. 277-282 ◽  
Author(s):  
Nada Perišić-Janjić ◽  
Lidija Jevrić ◽  
Gordana Bončić-Caričić ◽  
Bratislav Jovanović
Keyword(s):  
Retention Behavior ◽  
Triazine Derivatives

Research on debris in-vessel cooling and retention behavior for the small modular reactor ACP100

2021 ◽  
Vol 134 ◽  
pp. 103641
Author(s):  
Qingan Xiang ◽  
Jian Deng ◽  
Juan Du ◽  
Jinsheng Bi ◽  
Baowen Chen ◽  
...  
Keyword(s):  
Retention Behavior ◽  
Small Modular Reactor

The Reactions of Substituted Germyl- and Silylhydrazines with BX3 and CY2 Acceptor Species

1972 ◽  
Vol 50 (4) ◽  
pp. 562-566 ◽  
Author(s):  
L. K. Peterson ◽  
K. I. Thé
Keyword(s):  
Molecular Weight ◽  
Nitrogen Atom ◽  
Low Temperatures ◽  
Adduct Formation ◽  
Steric Effects ◽  
Reaction Products ◽  
Hydrazine Derivatives ◽  
Basic Catalysts ◽  
Series Of Experiments ◽  
Electronic And Steric Effects

Boron trimethyl reacts with each of the organometalloid-hydrazine derivatives Me2NN(R)GeMe3 (R = H, Me, SiMe3) except Me2NN(SiMe3)GeMe3, and with Me2NNHSiMe3, forming 1:1 adducts. With Me2NN(SiMe3)GeMe3 and BMe3, no adduct was formed even at low temperatures. On the basis of p.m.r. spectra, the metalloid-substituted nitrogen atom rather than the terminal nitrogen, is indicated as the basic center at which adduct formation occurs. With BF3, the Si—N and Ge—N bonds of the hydrazine derivatives were cleaved, again indicating attack at the central nitrogen atom. In a series of experiments involving CY2 (Y = O, S) and Me2NN(R)MMe3 (R = H, Me, SiMe3; M = Si, Ge), reaction occurred readily for R = H, but less readily for R = Me and for the compound Me2NN(GeMe3)2, while no reaction was observed for the compounds Me2NN(SiMe3)2 and Me2NN(SiMe3)GeMe3, even when heat or basic catalysts were employed. Reaction products, carbamate and thiocarbamate derivatives, Me2NN(R)C(Y)YMMe3, were characterized on the basis molecular weight, i.r., p.m.r., and mass spectroscopy, and m.p. data. Ease of formation is discussed in terms of electronic and steric effects.

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