Solid state stereochemistry of crown ethers: X-ray crystal structure and <sup>13</sup>C NMR studies of the LiNCS comple× of 1,4,7,11-tetrao×acyclotetradecane
Solid state stereochemistry of crown ethers: X-ray crystal structure and <sup>13</sup>C NMR studies of the LiNCS comple× of 1,4,7,11-tetrao×acyclotetradecane