Topochemistry and Photomechanical Effects in Crystals of Green Fluorescent Protein-like Chromophores: Effects of Hydrogen Bonding and Crystal Packing
Panče Naumov; Janusz Kowalik; Kyril M. Solntsev; Anthony Baldridge; Jong-Seok Moon; Christine Kranz; Laren M. Tolbert; Journal of the American Chemical Society 132 (2010) 5845–5857; doi:10.1021/ja100844m

data_4102330
_publ_section_title
;
 Topochemistry and Photomechanical Effects in Crystals of Green
 Fluorescent Protein-like Chromophores: Effects of Hydrogen Bonding and
 Crystal Packing
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              5845
_journal_page_last               5857
_journal_paper_doi               10.1021/ja100844m
_journal_volume                  132
_journal_year                    2010
_chemical_formula_sum            'C14 H16 N2 O'
_chemical_formula_weight         228.29
_chemical_name_systematic
;
 (Z)-4-(2,5-diemethylbenzylidene)-1,2-dimethyl-
1H-imidazol-5(4H)-one
;
_space_group_IT_number           148
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  '-R 3'
_symmetry_space_group_name_H-M   'R -3 :H'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            18
_cell_length_a                   27.911(7)
_cell_length_b                   27.911(7)
_cell_length_c                   8.407(2)
_cell_measurement_temperature    293(2)
_cell_volume                     5672(2)
_computing_cell_refinement       'APEX2 software (Bruker, 2007)'
_computing_data_collection       'APEX2 software (Bruker, 2007)'
_computing_data_reduction        'SAINT (Bruker, 2007)'
_computing_molecular_graphics    'DIAMOND (Brandenburg, 2005)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker SMART APEX2 diffractometer'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  'multilayer confocal TXS mirror'
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0267
_diffrn_reflns_av_sigmaI/netI    0.0169
_diffrn_reflns_limit_h_max       33
_diffrn_reflns_limit_h_min       -33
_diffrn_reflns_limit_k_max       33
_diffrn_reflns_limit_k_min       -33
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            16457
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.46
_exptl_absorpt_coefficient_mu    0.077
_exptl_absorpt_correction_T_max  0.9962
_exptl_absorpt_correction_T_min  0.9780
_exptl_absorpt_correction_type   sphere
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.203
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             2196
_exptl_crystal_size_max          0.29
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.301
_refine_diff_density_min         -0.196
_refine_diff_density_rms         0.074
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.088
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     162
_refine_ls_number_reflns         2213
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.088
_refine_ls_R_factor_all          0.0584
_refine_ls_R_factor_gt           0.0425
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0986P)^2^+1.2226P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1363
_refine_ls_wR_factor_ref         0.1547
_reflns_number_gt                1729
_reflns_number_total             2213
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja100844m_si_007.cif
_cod_data_source_block           t6_3_0m
_cod_original_cell_volume        5672(3)
_cod_original_sg_symbol_H-M      'R -3'
_cod_database_code               4102330