Hydrogen bonding in diphenylmethanols, <i>R</i>CPh<sub>2</sub>OH: structures of monomeric (4-biphenyl)diphenylmethanol and diphenyl(2-pyridyl)methanol, dimeric 1,1,3-triphenylpropyn-1-ol, trimeric 2-methyl-1,1-diphenylpropan-1-ol, tetrameric diphenyl(2-thienyl)methanol, hexameric bis(pentafluorophenyl)methanol (at 293 and 173 K) and polymeric diphenylmethanol
作者:G. Ferguson、C. D. Carroll、C. Glidewell、C. M. Zakaria、A. J. Lough
DOI:10.1107/s0108768194013984
日期:1995.6.1
(4-Biphenyl)diphenylmethanol (1), C25H20O, orthorhombic, P2(1)2(1)2(1), a = 8.3580 (11), b = 13.8976 (17), c = 15.5915 (12)Angstrom, Z = 4, R = 0.032 for 1146 observations [I > 3 sigma(I)]: the structure contains isolated monomers with no hydrogen bonding. Diphenyl(2-pyridyl)methanol (2), C18H15NO, monoclinic, P2(1)/c, a = 8.1899 (8), b = 14.855 (2), c = 11.6069 (15)Angstrom, beta = 96.344 (8)degrees, Z = 4, R = 0.049 for 879 observations [I > 3 sigma(1)]: the structure consists of isolated monomers in which the intramolecular O-H ... N hydrogen-bond motif has graph set S(5). 1,1,3-Triphenylpropyn-1-ol (3), C21H16O, monoclinic, P2(1)/c, a = 5.9794 (12), b = 9.953 (3), c = 26.420 (3)Angstrom, beta = 91.365 (12)degrees, Z = 4, R = 0.039 for 971 observations [I > 2 sigma(I)]: the structure contains centrosymmetric dimers held together by O-H ...pi(arene) hydrogen bonds involving one of the phenyl groups, rather than the propargyl group. 2-Methyl-1,1-diphenylpropan-1-ol (4), C16H18O, trigonal, P31c, a = 13.9232 (17), c = 12.0200 (19)Angstrom, Z = 6, R = 0.031 for 763 observations [I > 3 sigma(I)]: the structure consists of cyclic hydrogen-bonded trimers with crystallographic threefold symmetry and disordered hydroxyl H atoms in a motif with graph set R(3)(3)(6): the O ... O distance in the trimers is 2.864 (7)Angstrom. Diphenyl(2-thienyl)methanol (5), C17H14OS, rhombohedral, R $($) over bar$$ 3, a = 19.20 (1), c = 26.48 (1)Angstrom, Z = 24: this compound is isomorphous and isostructural with triphenylmethanol, Ph,COH, and forms hydrogen-bonded tetrahedral tetramers. Bis(pentafluorophenyl)methanol (6), C13H2F10O, rhombohedral, R $($) over bar$$ 3, a = 26.113 (3), c = 9.788 (3)Angstrom (at 293 K), R = 0.068 for 1214 observations [I > 2 sigma(I)]; a = 26.006 (4), c = 9.5941 (11)Angstrom (at 173 K), R = 0.072 for 1889 observations [I > 2 sigma(I)], Z = 18; the structure consists of coaxial stacks of cyclic hydrogen-bonded hexamers, each of ($) over bar 3 symmetry, and with a hydrogen-bond motif of graph set R(6)(6)(12). Within the hexamers, the molecules are disordered over two orientations in the ratio 0.779 (3):0.221 (3) at 293 K and 0.776 (2):0.224 (2) at 173 K: the O ... O distance is 2.702 (4)Angstrom at 293 K and 2.683 (4)Angstrom at 173 K. Diphenylmethanol (7), C13H12O, orthorhombic, P22(1)2(1), a = 5.1300 (10), b = 18.650 (5), c = 21.168 (6)Angstrom, Z = 8, R = 0.035 for 1487 observations [I > 3 sigma(I)]: there are two molecules in the asymmetric unit and the molecules are linked by hydrogen bonds into spiral chains having graph set C(4) and lying parallel to the a-axis; the O ... O distances within the chains are 2.826 (3) and 2.878 (3)Angstrom.
(4-联苯基)二苯基甲醇(1),化学式为C25H20O,属于正交晶系,空间群为P2(1)2(1)2(1),晶胞参数为a = 8.3580(11) Å,b = 13.8976(17) Å,c = 15.5915(12) Å,单位晶胞分子数Z = 4。该晶体结构由孤立的单体分子组成,不存在氢键,R因子为0.032,基于1146次观测数据(I > 3σ(I))。
二苯基(2-吡啶基)甲醇(2),化学式为C18H15NO,属于单斜晶系,空间群为P2(1)/c,晶胞参数为a = 8.1899(8) Å,b = 14.855(2) Å,c = 11.6069(15) Å,β角为96.344(8)°,单位晶胞分子数Z = 4。该结构由孤立单体组成,分子内存在O-H...N氢键,图式集为S(5),R因子为0.049,基于879次观测数据(I > 3σ(I))。
1,1,3-三苯基丙炔-1-醇(3),化学式为C21H16O,属于单斜晶系,空间群为P2(1)/c,晶胞参数为a = 5.9794(12) Å,b = 9.953(3) Å,c = 26.420(3) Å,β角为91.365(12)°,单位晶胞分子数Z = 4。该结构由中心对称的二聚体组成,通过O-H...π(芳环)氢键连接,其中一个苯基参与氢键而非丙炔基,R因子为0.039,基于971次观测数据(I > 2σ(I))。
2-甲基-1,1-二苯基丙-1-醇(4),化学式为C16H18O,属于三斜晶系,空间群为P31c,晶胞参数为a = 13.9232(17) Å,c = 12.0200(19) Å,单位晶胞分子数Z = 6。该结构由具有晶体学三重对称性的环状氢键三聚体组成,羟基H原子在图式集R(3)(3)(6)中处于无序状态,三聚体中O...O距离为2.864(7) Å,R因子为0.031,基于763次观测数据(I > 3σ(I))。
二苯基(2-噻吩基)甲醇(5),化学式为C17H14OS,属于菱形晶系,空间群为R$\bar3}$,晶胞参数a = 19.20(1) Å,c = 26.48(1) Å,单位晶胞分子数Z = 24。该化合物与三苯基甲醇结构和晶形相同,形成通过氢键连接的四面体四聚体。
双(五氟苯基)甲醇(6),化学式为C13H2F10O,属于菱形晶系,空间群为R$\bar3}$,晶胞参数在293 K时为a = 26.113(3) Å,c = 9.788(3) Å,R因子为0.068,基于1214次观测数据(I > 2σ(I));在173 K时为a = 26.006(4) Å,c = 9.5941(11) Å,R因子为0.072,基于1889次观测数据(I > 2σ(I)),单位晶胞分子数Z = 18。该结构由具有$\bar3}$对称性的环状氢键六聚体堆叠而成,每个六聚体内分子在两种取向下无序,293 K时比例为0.779(3):0.221(3),173 K时为0.776(2):0.224(2)。六聚体内O...O距离分别为293 K时的2.702(4) Å和173 K时的2.683(4) Å。
二苯基甲醇(7),化学式为C13H12O,属于正交晶系,空间群为P22(1)2(1),晶胞参数为a = 5.1300(10) Å,b = 18.650(5) Å,c = 21.168(6) Å,单位晶胞分子数Z = 8。该结构中两个分子在不对称单元中由氢键连接形成沿a轴螺旋的链状结构,图式集为C(4)。链内O...O距离分别为2.826(3) Å和2.878(3) Å,R因子为0.035,基于1487次观测数据(I > 3σ(I))。