#------------------------------------------------------------------------------
#$Date: 2012-02-03 19:16:24 +0200 (Fri, 03 Feb 2012) $
#$Revision: 32112 $
#$URL: file:///home/coder/svn-repositories/cod/cif/2/10/11/2101191.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_2101191
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           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_cell_angle_alpha                90
_cell_angle_beta                 105.700(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.6430(10)
_cell_length_b                   9.2880(10)
_cell_length_c                   15.1530(10)
_cell_volume                     1713.0(3)
_diffrn_radiation_type           Cu
_diffrn_radiation_wavelength     1.54178
_exptl_absorpt_coefficient_mu    0.67
_exptl_crystal_density_diffrn    1.27
_exptl_crystal_F_000             696
_[local]_cod_data_source_file    br0027.cif
_[local]_cod_data_source_block   1b
_cod_original_cell_volume        1713.0(10)
_cod_database_code               2101191
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
O(1) .10180(10) .5415(2) .22060(10)
O(2) .18630(10) .4480(2) .12280(10)
O(3) .04050(10) .2035(2) .15190(10)
O(4) .1603(2) .0283(2) .14710(10)
C(1) .2995(2) .3993(3) .36110(10)
C(2) .2189(2) .3457(3) .27200(10)
C(3) .2041(2) .2049(3) .26690(10)
C(4) .2680(2) .1210(3) .3524(2)
C(4A) .3906(2) .1624(3) .36360(10)
C(5) .4788(2) .0677(3) .37290(10)
C(6) .5822(2) .1299(4) .3825(2)
C(7) .5971(2) .2735(4) .3813(2)
C(8) .5106(2) .3717(3) .37180(10)
C(8A) .4071(2) .3125(3) .36550(10)
C(9) .2565(2) .3355(4) .4378(2)
C(10) .2410(2) .1966(4) .4334(2)
C(11) .3068(2) .5624(3) .3697(2)
C(12) .1687(2) .4480(3) .19620(10)
C(13) .0584(3) .6548(4) .1555(3)
C(14) .1356(2) .1323(3) .1836(2)
C(15) -.0286(3) .1540(5) .0646(2)
C(16) .2344(3) -.0377(4) .3494(4)
C(17) .4752(3) -.0938(4) .3729(3)
C(18) .5392(3) .5282(4) .3679(2)
H(6) .644(2) .063(3) .390(2)
H(7) .670(2) .318(3) .383(2)
H(9) .245(2) .401(2) .4860(10)
H(10) .217(2) .140(2) .480(2)
H(11A) .363(2) .595(3) .428(2)
H(11B) .327(2) .611(3) .318(2)
H(11C) .235(2) .601(3) .375(2)
H(13A) .124(3) .709(3) .137(2)
H(13B) .016(3) .721(4) .181(3)
H(13C) .025(2) .607(3) .096(2)
H(15A) .015(3) .156(3) .020(3)
H(15B) -.056(3) .047(4) .076(2)
H(15C) -.092(3) .224(3) .052(2)
H(16A) .249(2) -.093(3) .300(2)
H(16B) .151(2) -.041(3) .347(2)
H(16C) .268(2) -.087(3) .408(2)
H(17A) .552(3) -.134(3) .380(2)
H(17B) .447(2) -.139(3) .419(2)
H(17C) .424(2) -.137(3) .318(2)
H(18A) .535(2) .585(3) .421(2)
H(18B) .493(2) .580(3) .316(2)
H(18C) .616(2) .542(3) .362(2)
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
O(1) C(12) 1.332(3)
O(1) C(13) 1.445(4)
O(2) C(12) 1.193(3)
O(3) C(14) 1.342(3)
O(3) C(15) 1.449(3)
O(4) C(14) 1.196(3)
C(1) C(2) 1.538(3)
C(1) C(8A) 1.566(3)
C(1) C(9) 1.530(4)
C(1) C(11) 1.521(4)
C(2) C(3) 1.321(4)
C(2) C(12) 1.493(3)
C(3) C(4) 1.540(3)
C(3) C(14) 1.485(3)
C(4) C(4A) 1.561(3)
C(4) C(10) 1.530(4)
C(4) C(16) 1.531(4)
C(4A) C(5) 1.397(4)
C(4A) C(8A) 1.409(4)
C(5) C(6) 1.401(4)
C(5) C(17) 1.501(5)
C(6) C(7) 1.348(5)
C(7) C(8) 1.401(4)
C(8) C(8A) 1.399(3)
C(8) C(18) 1.504(5)
C(9) C(10) 1.304(5)
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
C(12) O(1) C(13) 115.9(2)
C(14) O(3) C(15) 115.5(2)
C(2) C(1) C(8A) 103.4(2)
C(2) C(1) C(9) 104.7(2)
C(2) C(1) C(11) 114.1(2)
C(8A) C(1) C(9) 104.6(2)
C(8A) C(1) C(11) 118.5(2)
C(9) C(1) C(11) 110.2(2)
C(1) C(2) C(3) 114.9(2)
C(1) C(2) C(12) 120.8(2)
C(3) C(2) C(12) 124.1(2)
C(2) C(3) C(4) 114.7(2)
C(2) C(3) C(14) 122.7(2)
C(4) C(3) C(14) 122.6(2)
C(3) C(4) C(4A) 104.3(2)
C(3) C(4) C(10) 105.2(2)
C(3) C(4) C(16) 112.6(2)
C(4A) C(4) C(10) 103.3(2)
C(4A) C(4) C(16) 120.0(2)
C(10) C(4) C(16) 110.2(3)
C(4) C(4A) C(5) 126.7(2)
C(4) C(4A) C(8A) 112.5(2)
C(5) C(4A) C(8A) 120.8(2)
C(4A) C(5) C(6) 116.6(3)
C(4A) C(5) C(17) 127.3(3)
C(6) C(5) C(17) 116.0(3)
C(5) C(6) C(7) 122.4(3)
C(6) C(7) C(8) 122.5(3)
C(7) C(8) C(8A) 116.2(3)
C(7) C(8) C(18) 116.4(2)
C(8A) C(8) C(18) 127.4(2)
C(1) C(8A) C(4A) 112.7(2)
C(1) C(8A) C(8) 125.9(2)
C(4A) C(8A) C(8) 121.4(2)
C(1) C(9) C(10) 115.0(2)
C(4) C(10) C(9) 115.6(3)
O(1) C(12) O(2) 123.5(2)
O(1) C(12) C(2) 111.8(2)
O(2) C(12) C(2) 124.7(2)
O(3) C(14) O(4) 123.6(2)
O(3) C(14) C(3) 109.9(2)
O(4) C(14) C(3) 126.4(2)