yl-3-oxide (NITpBA−) has two different types of potentially metal-coordinating sites. One is the carboxylate group, the other consists of the two oxygen atoms belonging to the nitronyl nitroxide part. The nitronyl nitroxides have generally revealed a rather weak coordinating ability and they have been found only to coordinate metal ions with a low electron density as in the case of hexafluoro-acetylecetonates
摘要有机阴离子自由基2-(4-羧基-苯基)-4,4,5,5-四甲基-4,5-二氢-
1H-咪唑-1-氧基-3-氧化物(NITpBA-)有两种不同的类型潜在的
金属配位点。一个是
羧酸根,另一个是由属于亚
硝酰基氮氧化物部分的两个氧原子组成。
硝酰基硝基氧化物通常显示出相当弱的配位能力,并且发现它们仅在六
氟-乙酰基
乙二酸酯的情况下配位具有低电子密度的
金属离子。但是,在简单的
羧酸盐Mn(NITpBA)2(
H2O)2中,每个MnII离子同时被
水,
羧酸氧和自由基氧配位,而NITpBA-
配体桥接MnII离子,从而获得梯状结构。还制备了NiII衍
生物,发现它与Mn盐是同构的。Mn(NITpBA)2( )2在单斜晶系,P21 / c(14号)空间群中结晶,a = 12.644(2),b = 9.203(2),c = 13.598(2),β= 115.21 (1)°,V = 1431.6(4)A 3,Z = 2