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首页> 外文期刊>Crystal growth & design >Vibrational spectroscopic studies of cocrystals and salts. 4. cocrystal products formed by benzylamine, α-methylbenzylamine, and their chloride salts
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Vibrational spectroscopic studies of cocrystals and salts. 4. cocrystal products formed by benzylamine, α-methylbenzylamine, and their chloride salts

机译：共晶体和盐的振动光谱研究。 4.由苄胺，α-甲基苄胺及其氯化物盐形成的共晶产物

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The chloride salts formed by benzylamine and α-methylbenzylamine have been characterized using X-ray powder diffraction, differential scanning calorimetry, and infrared absorption spectroscopy. In addition, X-ray powder diffraction and differential scanning calorimetry have been used to establish formation or lack of formation of the 1:1 stoichiometric salt-cocrystal products containing the chloride salts and their respective free bases. For α-methylbenzylamine (which contains a single dissymmetric center), the chiral identities of the free bases and chloride salts were found to play a determining role as to whether a salt-cocrystal product could or could not be formed. It was found that a salt-cocrystal product could only be formed if the salt and free base were of opposite absolute configurations. For those systems where the existence of cocrystals was demonstrated, assignments were derived for the observed peaks in the infrared absorption spectra of the reactants and their products.
机译：使用X射线粉末衍射，差示扫描量热法和红外吸收光谱对由苄胺和α-甲基苄胺形成的氯化物盐进行了表征。另外，X射线粉末衍射和差示扫描量热法已经用于确定形成或不形成含有氯化物盐和它们各自的游离碱的1：1化学计量的盐-共结晶产物。对于α-甲基苄基胺（包含一个不对称中心），发现游离碱和氯化物盐的手性对确定是否可以形成盐-共结晶产物起着决定性的作用。发现仅当盐和游离碱具有相反的绝对构型时，才能形成盐-共结晶产物。对于证明存在共晶体的那些系统，得出了反应物及其产物的红外吸收光谱中观察到的峰的归属。

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