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#$Date: 2022-10-03 17:40:12 +0300 (Mon, 03 Oct 2022) $
#$Revision: 278324 $
#$URL: file:///home/coder/svn-repositories/cod/cif/2/00/01/2000166.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided by IUCr Journals, http://journals.iucr.org/.
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_2000166
loop_
_publ_author_name
'Evans, K. L.'
'Fronczek, F. R.'
'Gandour, R. D.'
_publ_section_title
;
 1,3-Bis(2,6-dimethoxyphenyl)butenyne
;
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              2729
_journal_page_last               2731
_journal_paper_doi               10.1107/S0108270191004183
_journal_volume                  47
_journal_year                    1991
_chemical_formula_sum            'C20 H20 O4'
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_cell_angle_alpha                90
_cell_angle_beta                 91.229(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.8870(7)
_cell_length_b                   7.8150(9)
_cell_length_c                   27.478(4)
_cell_volume                     1693.3(3)
_diffrn_radiation_type           Cu
_diffrn_radiation_wavelength     1.54184
_exptl_absorpt_coefficient_mu    0.678
_exptl_crystal_density_diffrn    1.272
_exptl_crystal_F_000             688
_cod_data_source_file            st0499.cif
_cod_data_source_block           st0499a
_cod_original_cell_volume        1693.3(6)
_cod_original_sg_symbol_H-M      P21/n
_cod_original_formula_sum        C20H20O4
_cod_database_code               2000166
loop_
_space_group_symop_id
_space_group_symop_operation_xyz
1 x,y,z
2 -x+1/2,y+1/2,-z+1/2
3 -x,-y,-z
4 x+1/2,-y+1/2,z+1/2
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
O1 .27030(10) .2442(2) .25405(4) 4.70(2)
O2 .78810(10) .13400(10) .33326(4) 4.09(2)
O3 .02690(10) .3479(2) .43566(4) 4.66(2)
O4 .50510(10) .68240(10) .40814(4) 4.26(2)
C1 .4290(2) .1797(2) .24966(5) 3.61(3)
C2 .4928(2) .1128(2) .20669(5) 4.38(3)
C3 .6560(2) .0517(2) .20675(5) 4.75(3)
C4 .7589(2) .0540(2) .24792(6) 4.33(3)
C5 .6964(2) .1217(2) .29083(5) 3.49(2)
C6 .5298(2) .1839(2) .29237(4) 3.22(2)
C7 .4664(2) .2508(2) .33690(5) 3.22(2)
C8 .4217(2) .3027(2) .37545(5) 3.22(2)
C9 .3718(2) .3651(2) .42205(4) 2.97(2)
C10 .4239(2) .2895(2) .46314(5) 3.93(3)
C11 .2635(2) .5219(2) .42369(4) 3.13(2)
C12 .0896(2) .5096(2) .43240(5) 3.73(3)
C13 -.0074(2) .6564(2) .43744(6) 4.97(3)
C14 .0690(2) .8135(2) .43356(7) 5.67(4)
C15 .2396(2) .8311(2) .42372(6) 4.95(4)
C16 .3361(2) .6832(2) .41834(5) 3.63(3)
C17 .1645(2) .2499(3) .21155(6) 5.23(4)
C18 .9652(2) .0989(3) .33200(7) 5.32(4)
C19 -.1523(2) .3284(3) .44082(6) 5.42(4)
C20 .5835(2) .8414(2) .39697(7) 5.40(4)
H2 .427(2) .107(2) .1772(6) 5.1(4)
H3 .703(2) .007(2) .1771(7) 6.1(4)
H4 .874(2) .013(2) .2483(6) 5.2(4)
H10a .494(2) .188(2) .4643(6) 4.1(3)
H10b .391(2) .337(2) .4928(7) 5.9(4)
H13 -.129(2) .647(2) .4431(7) 6.7(5)
H14 -.007(2) .911(3) .4372(7) 7.3(5)
H15 .290(2) .939(2) .4217(6) 5.3(4)
H17a .054(2) .297(2) .2225(7) 6.0(4)
H17b .217(2) .328(3) .1859(8) 8.5(6)
H17c .156(2) .129(2) .1979(8) 7.1(5)
H18a 1.011(2) .127(2) .3637(7) 6.6(5)
H18b .983(2) -.029(3) .3237(8) 7.9(6)
H18c 1.024(2) .171(2) .3082(7) 6.6(5)
H19a -.181(3) .206(3) .4393(8) 8.4(6)
H19b -.189(2) .387(3) .4696(7) 7.1(5)
H19c -.219(2) .387(3) .4152(8) 7.2(5)
H20a .693(2) .815(3) .3885(7) 7.0(5)
H20b .513(2) .908(3) .3728(8) 7.5(5)
H20c .603(3) .911(3) .4297(9) 8.6(6)
