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  ______     ___     ______      ___     _    _   
 /_____//   / _ \\  |      \\   / _ \\  | |  | || 
 `____ `   / //\ \\ |  --  //  / //\ \\ | |/\| || 
 /___//   |  ___  |||  --  \\ |  ___  |||  /\  || 
 `__ `    |_||  |_|||______// |_||  |_|||_// \_|| 
 /_//     `-`   `-` `------`  `-`   `-` `-`   `-` 
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Text this: Synthesis of some selenacrown ethers and the thermodynamic origin of their complexation with C60