Kinetically inert cryptate systems: solid state and solution NMR studies

被引:15
作者
Apperley, DC
Clegg, W
Coles, S
Coyle, JL
Martin, N
Maubert, B
McKee, V [1 ]
Nelson, J
机构
[1] Queens Univ Belfast, Sch Chem, Belfast BT9 5AG, Antrim, North Ireland
[2] UDIRL, Solid State NMR Serv, Durham DH1 3LE, England
[3] Open Univ, Dept Chem, Milton Keynes MK7 6AA, Bucks, England
[4] SERC, Daresbury Lab, CLRC, Warrington WA4 4AD, Cheshire, England
[5] Univ Newcastle Upon Tyne, Dept Chem, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
[6] Univ Southampton, Dept Chem, Southampton SO17 1BJ, Hants, England
来源
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1999年 / 02期
关键词
D O I
10.1039/a806791k
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Mononuclear cryptates of Pb2+, Cd2+ and Hg2+ with the small host 1,4,7,10,13,16,21,24-octaazabicyclo[8.8.8]hexacosa-4,6,13,15,21,23-hexaene (imBT) showed satellite peaks in H-1 NMR solution spectra throughout the accessible (-40 to +70 degrees C) fluid range of solvents used indicating kinetic inertness toward decomplexation. Solid-state MAS NMR studies were made on these cryptates and on dinuclear silver(I) and copper(I) analogues, in the latter case establishing coupling of Cu-63,Cu-65 to N-15. A crystal structure determination of the mercury cryptate showed a symmetrical six-co-ordinate site for Hg2+ with all imino nitrogens co-ordinated, consistent with the observation, for the isomorphous cadium(II) complex, of a 13-line Cd-113 resonance in the CP MAS NMR spectrum.
引用
收藏
页码:229 / 236
页数:8
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