Transient States in [2 + 2] Photodimerization of Cinnamic Acid: Correlation of Solid-State NMR and X-ray Analysis
Mujeeb Khan; Gunther Brunklaus; Volker Enkelmann; Hans-Wolfgang Spiess; Journal of the American Chemical Society 130 (2008) 1741–1748; doi:10.1021/ja0773711

data_4107366
_publ_contact_author_address
; 
 Max-Planck-Institute for Polymer Research 
 P.O. Box 3148 
 D_55021 Mainz 
 Germany 
;
_publ_contact_author_email       ve@mpip-mainz.mpg.de
_publ_contact_author_fax         'Int+6131 379100'
_publ_contact_author_name        'Volker Enkelmann'
_publ_contact_author_phone       'Int+6131 379133'
_publ_section_title
;
 Transient States in [2 + 2] Photodimerization of Cinnamic Acid:
 Correlation of Solid-State NMR and X-ray Analysis
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              1741
_journal_page_last               1748
_journal_paper_doi               10.1021/ja0773711
_journal_volume                  130
_journal_year                    2008
_chemical_formula_moiety         'C9 H8 O2'
_chemical_formula_sum            'C9 H8 O2'
_chemical_formula_weight         148.16
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             07-06-27
_audit_creation_method           CRYSTALS_ver_12.39
_cell_angle_alpha                90
_cell_angle_beta                 106.2997(14)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.6455(4)
_cell_length_b                   18.4798(6)
_cell_length_c                   7.6562(5)
_cell_measurement_reflns_used    0
_cell_measurement_temperature    250
_cell_measurement_theta_max      0
_cell_measurement_theta_min      0
_cell_volume                     766.65(8)
_computing_cell_refinement       'Denzo/Scalepack (Otwinowski & Minor, 1996)'
_computing_data_collection       'COLLECT (Nonius BV, 1997)'
_computing_data_reduction        'Denzo/Scalepack (Otwinowski & Minor, 1996)'
_computing_molecular_graphics    'CAMERON (Watkin et al 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al 2003)'
_computing_structure_solution    'SHELXS 86 (Sheldrick, 1986)'
_diffrn_ambient_temperature      250
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.975
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.029
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            12503
_diffrn_reflns_theta_full        25.080
_diffrn_reflns_theta_max         29.506
_diffrn_reflns_theta_min         4.147
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.87
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SORTAV (Blessing)'
_exptl_crystal_density_diffrn    1.284
_exptl_crystal_description       prism
_exptl_crystal_F_000             312
_exptl_crystal_size_max          0.41
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.31
_refine_diff_density_min         -0.24
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.2317
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     100
_refine_ls_number_reflns         1233
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0822
_refine_ls_R_factor_gt           0.0462
_refine_ls_shift/su_max          0.106610
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
;
 Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982) 
 [weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)] 
 where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax 
 Method = Robust Weighting (Prince, 1982) 
 W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^ 
 A~i~ are: 
 7.34 -5.90 4.99 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0424
_refine_ls_wR_factor_gt          0.0410
_refine_ls_wR_factor_ref         0.0410
_reflns_limit_h_max              7
_reflns_limit_h_min              -7
_reflns_limit_k_max              25
_reflns_limit_k_min              0
_reflns_limit_l_max              10
_reflns_limit_l_min              0
_reflns_number_gt                1233
_reflns_number_total             2086
_reflns_threshold_expression     I>3.00u(I)
_oxford_diffrn_Wilson_B_factor   0.00
_oxford_diffrn_Wilson_scale      0.00
_oxford_refine_ls_scale          6.703(16)
_oxford_structure_analysis_title 'CAdimer 250K 05-07'
_cod_data_source_file            ja0773711-file003.cif
_cod_data_source_block           trux250
_cod_original_sg_symbol_H-M      'P 1 21/n 1 '
_cod_database_code               4107366