#------------------------------------------------------------------------------
#$Date: 2008-04-03 13:11:48 +0300 (Thu, 03 Apr 2008) $
#$Revision: 326 $
#$URL: file:///home/coder/svn-repositories/cod/cif/2/2101193.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_2101193
loop_
_publ_author_name
'Jones, R.'
'Scheffer, J. R.'
'Trotter, J.'
'Yap, M.'
_publ_section_title
;
 Crystal structure and photochemistry of dimethyl
 1,4-dihydro-1,4,5,8-tetramethyl-1,4-ethenonaphthalene-2,3-dicarboxylate
;
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              597
_journal_page_last               600
_journal_volume                  50
_journal_year                    1994
_chemical_formula_sum            'C20 H22 O4'
_chemical_formula_weight         326.39
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   17.716(2)
_cell_length_b                   15.298(2)
_cell_length_c                   13.210(3)
_cell_volume                     3580(2)
_diffrn_radiation_type           Cu
_diffrn_radiation_wavelength     1.54178
_exptl_absorpt_coefficient_mu    0.64
_exptl_crystal_density_diffrn    1.21
_exptl_crystal_F_000             1392
_[local]_cod_data_source_file    br0027.cif
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
O(1) .14560(10) .35590(10) .71510(10)
O(2) .24010(10) .4224(2) .6396(2)
O(3) -.04050(10) .32560(10) .68460(10)
O(4) -.11320(10) .3901(2) .5749(2)
C(1) .00420(10) .15470(10) .5639(2)
C(2) .04770(10) .0827(2) .5895(2)
C(3) .12490(10) .0892(2) .6012(2)
C(4) .16140(10) .16860(10) .5877(2)
C(4A) .11880(10) .24200(10) .5611(2)
C(5) .15860(10) .32730(10) .5439(2)
C(6) .16990(10) .3586(2) .4506(2)
C(7) .1320(2) .3184(2) .3631(2)
C(8) .0585(2) .3133(2) .3504(2)
C(9) .00170(10) .3464(2) .4228(2)
C(10) -.00440(10) .3127(2) .5163(2)
C(10A) .04050(10) .23480(10) .5482(2)
C(11) -.0801(2) .1442(2) .5549(3)
C(12) .2460(2) .1734(2) .6009(3)
C(13) .18690(10) .3737(2) .6349(2)
C(14) .1631(3) .4019(4) .8079(3)
C(15) .21800(10) .4359(2) .4221(2)
C(16) -.0456(2) .4206(2) .3809(2)
C(17) -.05810(10) .3476(2) .5919(2)
C(18) -.0885(3) .3553(4) .7659(4)
H(2) .0210(10) .026(2) .602(2)
H(3) .1550(10) .039(2) .619(2)
H(7) .1650(10) .300(2) .303(2)
H(8) .0380(10) .293(2) .285(2)
H(11A) -.108(2) .164(2) .619(3)
H(11B) -.101(2) .179(2) .502(3)
H(11C) -.094(2) .084(3) .552(3)
H(12A) .260(2) .207(2) .658(2)
H(12B) .269(2) .196(2) .547(2)
H(12C) .265(2) .113(3) .612(3)
H(14A) .168(2) .463(3) .793(3)
H(14B) .128(3) .377(3) .858(4)
H(14C) .213(2) .386(3) .826(3)
H(15A) .2653 .4323 .4561
H(15B) .2260 .4367 .3513
H(15C) .1932 .4885 .4422
H(15D) .2347 .4648 .4823
H(15E) .1892 .4757 .3827
H(15F) .2606 .4170 .3847
H(16A) -.0162 .4727 .3793
H(16B) -.0882 .4297 .4239
H(16C) -.0622 .4067 .3149
H(16D) -.0211 .4457 .3243
H(16E) -.0938 .3992 .3617
H(16F) -.0518 .4642 .4321
H(18A) -.099(3) .417(3) .751(4)
H(18B) -.135(3) .328(3) .751(4)
H(18C) -.056(2) .358(3) .825(4)
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
O(1) C(13) 1.316(3)
O(1) C(14) 1.447(5)
O(2) C(13) 1.203(3)
O(3) C(17) 1.308(3)
O(3) C(18) 1.444(6)
O(4) C(17) 1.194(4)
C(1) C(2) 1.386(3)
C(1) C(10A) 1.398(3)
C(1) C(11) 1.507(4)
C(2) C(3) 1.381(4)
C(3) C(4) 1.388(3)
C(4) C(4A) 1.397(3)
C(4) C(12) 1.510(4)
C(4A) C(5) 1.500(3)
C(4A) C(10A) 1.403(3)
C(5) C(6) 1.338(3)
C(5) C(13) 1.483(3)
C(6) C(7) 1.470(4)
C(6) C(15) 1.506(4)
C(7) C(8) 1.316(4)
C(8) C(9) 1.477(4)
C(9) C(10) 1.342(3)
C(9) C(16) 1.516(4)
C(10) C(10A) 1.495(3)
C(10) C(17) 1.478(3)
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
C(13) O(1) C(14) 117.5(3)
C(17) O(3) C(18) 118.4(3)
C(2) C(1) C(10A) 118.5(2)
C(2) C(1) C(11) 119.0(2)
C(10A) C(1) C(11) 122.5(2)
C(1) C(2) C(3) 121.4(2)
C(2) C(3) C(4) 120.7(2)
C(3) C(4) C(4A) 119.0(2)
C(3) C(4) C(12) 119.3(2)
C(4A) C(4) C(12) 121.7(2)
C(4) C(4A) C(5) 118.9(2)
C(4) C(4A) C(10A) 120.1(2)
C(5) C(4A) C(10A) 121.0(2)
C(4A) C(5) C(6) 121.4(2)
C(4A) C(5) C(13) 116.9(2)
C(6) C(5) C(13) 121.7(2)
C(5) C(6) C(7) 120.4(2)
C(5) C(6) C(15) 126.6(2)
C(7) C(6) C(15) 113.0(2)
C(6) C(7) C(8) 125.2(2)
C(7) C(8) C(9) 124.9(2)
C(8) C(9) C(10) 121.3(2)
C(8) C(9) C(16) 113.4(2)
C(10) C(9) C(16) 125.3(2)
C(9) C(10) C(10A) 121.5(2)
C(9) C(10) C(17) 122.4(2)
C(10A) C(10) C(17) 116.1(2)
C(1) C(10A) C(4A) 120.4(2)
C(1) C(10A) C(10) 119.7(2)
C(4A) C(10A) C(10) 119.9(2)
O(1) C(13) O(2) 121.5(3)
O(1) C(13) C(5) 111.4(2)
O(2) C(13) C(5) 127.1(2)
O(3) C(17) O(4) 120.7(3)
O(3) C(17) C(10) 112.7(2)
O(4) C(17) C(10) 126.5(3)