Phosphorus, Sulfur and Silicon and the Related Elements p. 301 - 312 (1997)
Update date:2022-09-26
Topics:
D'Sa, Bosco A.
Verkade, John G.
The synthesis of a novel superbase P(HNCH2CH2)(i-PrNCH2CH2) 2N, 2a, is discussed. The conditions for the preparation and purification of H2NCH2CH2N(CH2CH 2N-i-Pr)2. 4a, starting from commercially available (H2NCH2CH2)3N (tren) were optimized. The existence of the novel zwitterion HP(N-CH2CH2)(i-PrNCH2CH 2)2N+, 2b, was substantiated by NMR spectroscopy. The Superbase 2a crystallizes from its melt when cooled slowly to -4 °C, and then remains as a solid at room temperature for several days. Hence it can be handled as a liquid or as a solid.
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