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

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Text this: Drastic steric effects from, respectively, a hydrogen, a methyl and an ethyl group on the coordination network of a zinc(II)-4,4′-bipyridine- carboxylato ternary system