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首页> 外文期刊>Acta Crystallographica, Section B. Structural Science >The 1 : 1 adduct of triphenylsilanol and 4,4 '-bipyridyl, and three pairwise-concomitant triclinic polymorphs of the 4 : 1 adduct having Z ' = 0.5, 1 and 4
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The 1 : 1 adduct of triphenylsilanol and 4,4 '-bipyridyl, and three pairwise-concomitant triclinic polymorphs of the 4 : 1 adduct having Z ' = 0.5, 1 and 4

机译:三苯基硅烷醇和4,4'-联吡啶的1:1加合物以及Z'= 0.5、1和4的4:1加合物的三个成对伴随的三斜晶型

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Crystallization from methanol solution of mixtures of triphenylsilanol and 4,4'-bipyridyl has given a 1: 1 adduct ( I), Ph3SiOH.C10H8N2, and three polymorphic 4: 1 adducts (II) - (IV), (Ph3SiOH)(4).C10H8N2. In (I), the components are linked by a single O-H...N hydrogen bond and by a number of C-H...pi(arene) hydrogen bonds to form a continuous three-dimensional structure. Compounds ( II) -( IV) are all triclinic, space group P (1) over bar, with Z' values of 0.5, 1 and 4, respectively. The basic hydrogen-bonded aggregate is the same in each of ( II) - ( IV), having a pair of silanol molecules linked to the bipyridyl via O-N...N hydrogen bonds and a further pair of silanol molecules linked to the first pair via O-H...O hydrogen bonds. In ( II) there is just one such aggregate lying across a centre of inversion (Z' = 0.5) and in (III) there are two such aggregates, both lying across centres of inversion (Z' = 2 x 0.5 = 1). In ( IV) there are six independent aggregates of this type, four of which lie across centres of inversion and two of which lie in general positions, so that Z' = (4 x 0.5) + 2 = 4. While the components in ( I) are fully ordered, each of ( II) -( IV) exhibits extensive disorder involving both the bipyridyl units and the phenyl rings of the silanol components. [References: 20]
机译:将三苯基硅烷醇和4,4'-联吡啶的混合物从甲醇溶液中结晶出来,得到了1:1加合物(I),Ph3SiOH.C10H8N2和三种多晶型4:1加合物(II)-(IV),(Ph3SiOH)(4 C10H8N2。在(I)中,组分通过单个O-H ... N氢键和多个C-H ... pi(芳烃)氢键连接以形成连续的三维结构。化合物(II)-(IV)均为三斜体,P上的空间群P(1),Z'值分别为0.5、1和4。氢键结合的碱性聚集体在(II)-(IV)的每一个中都相同,具有一对通过ON ... N氢键与联吡啶基连接的硅烷醇分子,和另外一对与第一对连接的硅烷醇分子通过OH ... O氢键在(II)中,只有一个这样的集合体位于反转中心(Z'= 0.5),在(III)中,有两个这样的集合体都位于反转中心(Z'= 2 x 0.5 = 1)。在(IV)中,有六个独立的这种类型的聚合,其中四个位于反转中心,两个位于一般位置,因此Z'=(4 x 0.5)+ 2 = 4。 I)是完全有序的,(II)-(IV)中的每一个均表现出广泛的无序性,涉及双吡啶基单元和硅烷醇组分的苯环。 [参考:20]

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