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Valence–Tautomeric Interconversion in a Bis(dioxolene)cobalt Complex with Iminopyridine Functionalized by a TEMPO Moiety. Phase Transition Coupled with Monocrystal Destruction
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2017-11-29 00:00:00 , DOI: 10.1021/acs.inorgchem.7b02597 Alexey A. Zolotukhin 1 , Michael P. Bubnov 1 , Alla V. Arapova 1 , Georgy K. Fukin 1 , Roman V. Rumyantcev 1 , Artem S. Bogomyakov 2 , Alexander V. Knyazev 3 , Vladimir K. Cherkasov 1
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2017-11-29 00:00:00 , DOI: 10.1021/acs.inorgchem.7b02597 Alexey A. Zolotukhin 1 , Michael P. Bubnov 1 , Alla V. Arapova 1 , Georgy K. Fukin 1 , Roman V. Rumyantcev 1 , Artem S. Bogomyakov 2 , Alexander V. Knyazev 3 , Vladimir K. Cherkasov 1
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Iminopyridine modified by TEMPO nitroxide was utilized for the synthesis of an octahedral bis(o-semiquinonato)cobalt complex. Variable-temperature magnetic susceptibility measurements detect a valence tautomeric transformation in the temperature range 200–300 K. A reproducible hysteresis loop of about 40 K width is observed on the magnetic moment temperature dependence in the transition region. Differential scanning calorimetry measurements confirm different temperatures of phase transitions accompanying a valence–tautomeric transformation upon heating and cooling. Attempts to study the structural changes associated with the valence–tautomeric transformation by single-crystal X-ray diffraction failed because of the crystal destruction taking place upon cooling from 220 K. The powder X-ray diffraction pattern indicated an essential change of the unit cell upon cooling from 240 K.
中文翻译：
由TEMPO部分官能化的具有亚氨基吡啶的双（二氧杂环戊烯）钴络合物中的价-互变异构互变。相变与单晶破坏耦合
TEMPO氮氧化物修饰的亚氨基吡啶用于合成八面体双（邻）-semiquinonato）钴配合物。可变温度磁化率测量可检测200–300 K温度范围内的价互变异构体转变。在过渡区域，磁矩温度相关性可观察到约40 K宽度的可复制磁滞回线。差示扫描量热法测量证实了加热和冷却时伴随价-互变异构转变的不同相变温度。试图研究与单价X射线衍射的价-互变异构相关的结构变化的尝试失败了，因为从220 K冷却时晶体发生了破坏。粉末X射线衍射图表明晶胞的本质变化从240 K开始冷却。
更新日期：2017-11-29
中文翻译：
由TEMPO部分官能化的具有亚氨基吡啶的双（二氧杂环戊烯）钴络合物中的价-互变异构互变。相变与单晶破坏耦合
TEMPO氮氧化物修饰的亚氨基吡啶用于合成八面体双（邻）-semiquinonato）钴配合物。可变温度磁化率测量可检测200–300 K温度范围内的价互变异构体转变。在过渡区域，磁矩温度相关性可观察到约40 K宽度的可复制磁滞回线。差示扫描量热法测量证实了加热和冷却时伴随价-互变异构转变的不同相变温度。试图研究与单价X射线衍射的价-互变异构相关的结构变化的尝试失败了，因为从220 K冷却时晶体发生了破坏。粉末X射线衍射图表明晶胞的本质变化从240 K开始冷却。
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