Hydrogen Bonds of Poly[(n-alkyl methacrylate)-co-(methacrylic acid)]’s in Dilute Solutions

1998 ◽  
Vol 71 (8) ◽  
pp. 1781-1789
Author(s):  
Akihiro Noguchi ◽  
Yasusi Masui ◽  
Hirohisa Oda ◽  
Masayuki Kuzuya
Keyword(s):  
Hydrogen Bonds ◽  
Methacrylic Acid ◽  
Dilute Solutions ◽  
Alkyl Methacrylate

The influence of hydrogen bonding on the character of N—H and C=O stretching modes in 2-thiopyrrole-1,2-dicarboximide

1984 ◽  
Vol 62 (9) ◽  
pp. 1845-1849 ◽  
Author(s):  
Shanker Ram
Keyword(s):  
Hydrogen Bonding ◽  
Transition Temperature ◽  
Solid State ◽  
Hydrogen Bonds ◽  
Spectral Data ◽  
Infrared Spectra ◽  
Cyclic Dimer ◽  
Dilute Solutions ◽  
Two Phases ◽  
Thermodynamical Functions

The infrared spectra (200–4000 cm−1) of 2-thiopyrrole-1,2-dicarboximide (TPH) in solid and solution forms have been measured as a function of temperature, and a direct correlation has been obtained between the two phases and the type and extent of hydrogen bonding. It is suggested that TPH exists as cyclic dimer in the solid state (below 310 K) and in dilute solutions by the formation of two equivalent hydrogen bonds. At the transition temperature, ~310 K, the cyclic dimer undergoes to the open-cyclic dimer and persists in this structure till 410 K. In addition, the thermodynamical functions ΔH0, and ΔS0 have been estimated using the spectral data in solution.

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