Synthesis, NMR Studies and Crystal Structure of Cryptand 4,7,10,16,21-Pentaoxa-1,13-diazabicyclo[11.5.5]tricosane, [H(3.1.1)·(H2O)3]Cl
作者:Tam Nguyen、Christopher M. Buckley、Trevor K. Ellis、Gary L. N. Smith、Douglas R. Powell、Richard W. Taylor
DOI:10.1007/s10870-012-0281-1
日期:2012.6
The cryptand 4,7,10,16,21-pentaoxa-1,13-diazabicyclo[11.5.5]tricosane (3.1.1, I) has been synthesized, the crystal structure of the triaquo-hydrochloride salt has been determined by single crystal X-ray crystallography and the 1H- and 13C-NMR chemical shifts have been assigned for the protonated ligand. [(C16H33N2O5)·(H2O)3]Cl, (I), is triclinic with space group $$P\bar1}$$ and cell constants: a = 9.957(3) Å, b = 10.557(5) Å, c = 11.324(3) Å, α = 95.917(8)°, β = 105.574(8)°, γ = 107.506(9)°, V = 1071.4(3) Å3 and Z = 2. In the solid state the cryptand is monoprotonated and holds a water molecule near the central cavity using the hydrogen bonds N13–H13 to O1S, O1S–H1S2 to N1 and O1S–H1S1 to ether oxygen atom O7. Pairs of cryptand molecules are linked by a hydrogen bond network, (O21···H2S2–O2S–H2S1···Cl1)2(μ-H3S1–O3S–H3S2)2, that interacts with an ether oxygen (O21, O21A) in each ligand molecule. The synthesis, NMR characterization, and X-ray structure of cryptand 3.1.1 are described.
合成了加密配体4,7,10,16,21-五氧-1,13-二氮双环[11.5.5]三十烷(3.1.1,I),并通过单晶X射线晶体学确定了其三水氯化物盐的晶体结构,同时对质子化配体的1H和13C-NMR化学位移进行了赋值。[(C16H33N2O5)·(H2O)3]Cl(I)为三斜晶系,空间群为 $$P\bar1}$$,晶胞参数为:a = 9.957(3) Å,b = 10.557(5) Å,c = 11.324(3) Å,α = 95.917(8)°,β = 105.574(8)°,γ = 107.506(9)°,V = 1071.4(3) ų,Z = 2。在固态中,加密配体为单质子化,并利用氢键(N13–H13与O1S;O1S–H1S2与N1;O1S–H1S1与醚氧原子O7)将一个水分子固定在中央腔附近。成对的加密配体分子通过氢键网络((O21···H2S2–O2S–H2S1···Cl1)2(μ-H3S1–O3S–H3S2)2)相互连接,并与每个配体分子中的醚氧(O21, O21A)相互作用。本文描述了加密配体3.1.1的合成、NMR表征和X射线结构。