Evidence for Solution-State Nonlinearity of sp-Carbon Chains Based on IR and Raman Spectroscopy: Violation of Mutual Exclusion
Andrea Lucotti; Matteo Tommasini; Daniele Fazzi; Mirella Del Zoppo; Wesley A. Chalifoux; Michael J. Ferguson; Giuseppe Zerbi; Rik R. Tykwinski; Journal of the American Chemical Society 131 (2009) 4239–4244; doi:10.1021/ja078198b

data_4104090
_publ_section_title
;
 Evidence for Solution-State Nonlinearity of sp-Carbon Chains Based on IR
 and Raman Spectroscopy: Violation of Mutual Exclusion
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              4239
_journal_page_last               4244
_journal_paper_doi               10.1021/ja078198b
_journal_volume                  131
_journal_year                    2009
_chemical_formula_moiety         'C28 H30, C4 H8 O'
_chemical_formula_sum            'C32 H38 O'
_chemical_formula_weight         438.62
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_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                 97.3220(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.0112(15)
_cell_length_b                   12.7895(12)
_cell_length_c                   11.8476(11)
_cell_measurement_reflns_used    3985
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      27.38
_cell_measurement_theta_min      2.41
_cell_volume                     2556.6(4)
_computing_cell_refinement       'Bruker SAINT (Bruker, 1997)'
_computing_data_collection       'Bruker SMART (Bruker, 1997)'
_computing_data_reduction        'Bruker SAINT (Bruker, 1997)'
_computing_molecular_graphics    'Bruker SHELXTL (Bruker, 1997)'
_computing_publication_material  'Bruker SHELXTL (Bruker, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      193(2)
_diffrn_detector_area_resol_mean 8.192
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type
'Bruker PLATFORM diffractometer/SMART 1000 CCD area detector'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0194
_diffrn_reflns_av_sigmaI/netI    0.0161
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            9416
_diffrn_reflns_theta_full        26.40
_diffrn_reflns_theta_max         26.40
_diffrn_reflns_theta_min         2.00
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.066
_exptl_absorpt_correction_T_max  0.9778
_exptl_absorpt_correction_T_min  0.9625
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.140
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       fragment
_exptl_crystal_F_000             952
_exptl_crystal_size_max          0.58
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.34
_refine_diff_density_max         0.269
_refine_diff_density_min         -0.144
_refine_diff_density_rms         0.046
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.047
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     253
_refine_ls_number_reflns         2618
_refine_ls_number_restraints     5
_refine_ls_restrained_S_all      1.048
_refine_ls_R_factor_all          0.0828
_refine_ls_R_factor_gt           0.0658
_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^)+(0.1251P)^2^+0.7566P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1856
_refine_ls_wR_factor_ref         0.2112
_reflns_number_gt                1912
_reflns_number_total             2618
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ja078198b_si_002.cif
_cod_data_source_block           compoundC12
_cod_database_code               4104090