Text this: BINDING OF CROWN ETHER Bz9C3, Bz12C4 AND Bz15C5 TO CATIONS BASED ON SEMIEMPIRICAL ORBITAL MOLECULAR CALCULATIONS

  ______    ______    ______    ______    ______  
 /_   _//  /_   _//  /_   _//  /_   _//  /_____// 
 `-| |,-    -| ||-     | ||     -| ||-   `____ `  
   | ||     _| ||_    _| ||     _| ||_   /___//   
   |_||    /_____//  /__//     /_____//  `__ `    
   `-`'    `-----`   `--`      `-----`   /_//     
                                         `-`