首页> 外文期刊>Journal of chemical crystallography >Crystal structure of (3,3 ',4,4 '-tetramethyl-1,1 '-diphosphaferrocen-2-yl) carboxylic acid and its bis-[W(CO)(5)] complex center dot 0.5C(5)H(12): Conformation of 1,1 '-diphosphaferrocenes
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Crystal structure of (3,3 ',4,4 '-tetramethyl-1,1 '-diphosphaferrocen-2-yl) carboxylic acid and its bis-[W(CO)(5)] complex center dot 0.5C(5)H(12): Conformation of 1,1 '-diphosphaferrocenes

机译:(3,3',4,4'-四甲基-1,1'-二磷铁茂铁-2-基)羧酸的晶体结构及其双-[W(CO)(5)]复杂中心点0.5C(5) H(12):1,1'-二磷二茂铁的构象

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The structures of (3,3',4,4'-tetramethyl-1,1'-diphosphaferrocen-2-yl)carboxylic acid (I) and its bis-[W(CO)(5)] pentane solvate complex (2) have been determined by X-ray analysis. The compound 1 crystallizes in the monoclinic P2(1) space group with Z = 4; a = 7.8404(9), b = 14.9441(16), c = 11.7730(14) Angstrom, beta = 92.773(10)degrees, V = 1377.8(3) Angstrom(3), and D-calc = 1.553 g cm(-3). The compound 2 crystallizes in the triclinic space group with two complex molecules and one pentane molecule in the unit cell. Cell parameters: a = 10.7070(2), b = 12.577(2), c = 13.239(3) Angstrom, alpha = 84.00(2), beta = 77.58(1), gamma = 66.06(1)degrees, V = 1591.0(5) Angstrom(3), and D-calc = 2.100 g cm(-3). The fully eclipsed conformation of the phospholyl rings with P ... P secondary bonding of 3.353(1) Angstrom is observed in 1 and a partially eclipsed conformation is found in 2. The 10 possible conformations of 1,1'-diphosphaferrocenes were described as the function of conformational parameter theta and observed geometry of the phospholyl rings.(7) We suppose that the earlier conclusions concerning the destabilizing nature of 1,1'-diphosphaferrocene conformations with a < 100 degrees cannot be considered as general. The mode of W-P coordination, the structural changes of 1 by W(CO)(5) coordination, the structural effect of phospholyl rings substitution by the -COOH group, and hydrogen bonds are analyzed. [References: 11]
机译:(3,3',4,4'-四甲基-1,1'-二磷铁茂铁-2-基)羧酸(I)及其双-[W(CO)(5)]戊烷溶剂合物的结构(2 )已通过X射线分析确定。化合物1在Z = 4的单斜P2(1)/ n空间群中结晶; a = 7.8404(9),b = 14.9441(16),c = 11.7730(14)埃,beta = 92.773(10)度,V = 1377.8(3)埃(3),D-calc = 1.553 g cm( -3)。化合物2在单位细胞中具有两个复杂分子和一个戊烷分子的三斜空间群中结晶。像元参数:a = 10.7070(2),b = 12.577(2),c = 13.239(3)埃,alpha = 84.00(2),beta = 77.58(1),γ= 66.06(1)度,V = 1591.0 (5)埃(3),D-calc = 2.100 g cm(-3)。在1中观察到具有3.353(1)埃的P ... P次级键的完全黯淡的构象,在2中发现了部分暗淡的构象。1,1'-二磷酸二茂铁的10种可能构象被描述为(7)我们假设,关于小于100度的1,1'-二磷二茂铁构象的去稳定性质的早期结论不能被认为是一般的。分析了W-P配位的模式,W(CO)(5)配位的1的结构变化,-COOH基团取代的磷酰基环的结构效应以及氢键。 [参考:11]

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