The title compound of 2-nitro-9,9-bis（methylpropionate）fluorine （C21H21NO6, Mr = 383.39） was synthesized for the first time. Complete assignments were achieved by 1H NMR, IR, EI-MS, elemental analysis and single-c...The title compound of 2-nitro-9,9-bis（methylpropionate）fluorine （C21H21NO6, Mr = 383.39） was synthesized for the first time. Complete assignments were achieved by 1H NMR, IR, EI-MS, elemental analysis and single-crystal X-ray diffraction technique. The crystal belongs to monoclinic, space group P21/c with a = 11.4581（15）, b = 10.3624（14）, c = 16.573（2） A.,/？ = 96.629（2）°, V = 1954.6（5） A3, Z = 4, Dc = 1.303 g/cm3, p = 0.096 mm-1, F（000） = 808, R = 0.0493 and wR = 0.1499 for 3107 observed reflections with I 〉 2tr（/）. X-ray analysis reveals that three fused rings of the fluorene system are almost coplanar and the two ester groups are nearly perpendicular to the fused-ring system. Weak C-H...O hydrogen bonding connects the molecules into centrosymmetric dimmers.展开更多
基金Supported by Project of Hubei Provincial Department of Education(Q2011902)the Key Project of Chinese Ministry of Education(211111)
文摘The title compound of 2-nitro-9,9-bis（methylpropionate）fluorine （C21H21NO6, Mr = 383.39） was synthesized for the first time. Complete assignments were achieved by 1H NMR, IR, EI-MS, elemental analysis and single-crystal X-ray diffraction technique. The crystal belongs to monoclinic, space group P21/c with a = 11.4581（15）, b = 10.3624（14）, c = 16.573（2） A.,/？ = 96.629（2）°, V = 1954.6（5） A3, Z = 4, Dc = 1.303 g/cm3, p = 0.096 mm-1, F（000） = 808, R = 0.0493 and wR = 0.1499 for 3107 observed reflections with I 〉 2tr（/）. X-ray analysis reveals that three fused rings of the fluorene system are almost coplanar and the two ester groups are nearly perpendicular to the fused-ring system. Weak C-H...O hydrogen bonding connects the molecules into centrosymmetric dimmers.
