Methyl 3,3,7,7,9-pentamethyl-1,5-dioxaspiro[5.5]undec-8-ene-8-carboxylate
Koskinen, Ari M. P.; Laitinen, Risto S.; Oilunkaniemi, Raija; Savilampi, Satu K.; Toivola, Reijo J.; Acta Crystallographica Section E 61 (2005) o1627–o1628; doi:10.1107/S1600536805013127

data_2206076
_publ_section_title
;
 Methyl
 3,3,7,7,9-pentamethyl-1,5-dioxaspiro[5.5]undec-8-ene-8-carboxylate
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1627
_journal_page_last               o1628
_journal_paper_doi               10.1107/S1600536805013127
_journal_volume                  61
_journal_year                    2005
_chemical_formula_moiety         'C16 H26 O4'
_chemical_formula_sum            'C16 H26 O4'
_chemical_formula_weight         282.37
_chemical_name_systematic
;
Methyl 3,3,7,7,9-pentamethyl-1,5-dioxaspiro[5.5]undec-8-ene-8-carboxylate
;
_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
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 106.81(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.735(2)
_cell_length_b                   9.4311(19)
_cell_length_c                   16.610(3)
_cell_measurement_reflns_used    2855
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      26.00
_cell_measurement_theta_min      2.51
_cell_volume                     1609.8(6)
_computing_cell_refinement       'DENZO--SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1998)'
_computing_data_reduction        DENZO--SMN
_computing_molecular_graphics    'DIAMOND (Brandenburg & Berndt, 1999)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Bruker--Nonius KappaCCD'
_diffrn_measurement_method       '\f scans, and \w scans with \k offsets'
_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  0.0393
_diffrn_reflns_av_sigmaI/netI    0.0231
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            20225
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.51
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.165
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             616
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.275
_refine_diff_density_min         -0.227
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.083
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     187
_refine_ls_number_reflns         3133
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.083
_refine_ls_R_factor_all          0.0429
_refine_ls_R_factor_gt           0.0379
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0656P)^2^+0.4495P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1081
_refine_ls_wR_factor_ref         0.1197
_reflns_number_gt                2855
_reflns_number_total             3133
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            su6192.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:

'_geom_bond_publ_flag' tag value 'n0' was replaced with 'no' value.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
;
_cod_original_cell_volume        1609.7(6)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2206076