Tetrahedron

Strong hydrogen bond-mediated complexation of H 2 PO 4− by neutral bis-thiourea hosts

P Bühlmann, S Nishizawa, KP Xiao, Y Umezawa

文献索引：Buehlmann, Philippe; Nishizawa, Seiichi; Xiao, Kang Ping; Umezawa, Yoshio Tetrahedron, 1997 , vol. 53, # 5 p. 1647 - 1654

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被引用次数: 242

摘要

Highly preorganized bis-thiourea receptors based on a xanthene spacer selectively (H2PO4−> CH3COO−> Cl−) bind dihyrogenphosphate via multitopic hydrogen bonding, giving stronger complexes with H2PO4− neutral receptor known so far. The high complexation strengths are rationalized by the hydrogen bond donor strength of the thiourea groups and by host preorganization. The hydrogen acceptor strengths of the guest anions ...