The crystal structure described by B2(CN2)3 crystallizes in the triclinic P-1 space group. There are four inequivalent B sites. In the first B site, B(1) is bonded to one N(12), one N(3), one N(6), and one N(8) atom to form BN4 tetrahedra that share  a cornercorner with one C(1)N4 tetrahedra,  a cornercorner with one C(2)N4 tetrahedra,  a cornercorner with one C(3)N4 tetrahedra, corners with two equivalent C(4)N4 tetrahedra, and corners with three equivalent C(6)N4 tetrahedra. In the second B site, B(2) is bonded to one N(11), one N(2), and two equivalent N(10) atoms to form BN4 tetrahedra that share  a cornercorner with one B(3)N4 tetrahedra,  a cornercorner with one C(2)N4 tetrahedra,  a cornercorner with one C(5)N4 tetrahedra,  a cornercorner with one C(6)N4 tetrahedra, corners with two equivalent C(3)N4 tetrahedra, corners with three equivalent C(1)N4 tetrahedra, and  an edgeedge with one B(2)N4 tetrahedra. In the third B site, B(3) is bonded to one N(11), one N(5), one N(7), and one N(9) atom to form BN4 tetrahedra that share  a cornercorner with one B(2)N4 tetrahedra,  a cornercorner with one C(1)N4 tetrahedra,  a cornercorner with one C(3)N4 tetrahedra,  a cornercorner with one C(4)N4 tetrahedra, corners with three equivalent C(5)N4 tetrahedra, and  an edgeedge with one C(2)N4 tetrahedra. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one N(1), one N(3), and one N(4) atom. There are six inequivalent C sites. In the first C site, C(1) is bonded to one N(10), one N(2), one N(6), and one N(9) atom to form CN4 tetrahedra that share  a cornercorner with one B(1)N4 tetrahedra,  a cornercorner with one B(3)N4 tetrahedra,  a cornercorner with one C(3)N4 tetrahedra,  a cornercorner with one C(4)N4 tetrahedra,  a cornercorner with one C(5)N4 tetrahedra,  a cornercorner with one C(6)N4 tetrahedra, and corners with three equivalent B(2)N4 tetrahedra. In the second C site, C(2) is bonded to one N(11), one N(12), one N(4), and one N(7) atom to form CN4 tetrahedra that share  a cornercorner with one B(1)N4 tetrahedra,  a cornercorner with one B(2)N4 tetrahedra,  a cornercorner with one C(5)N4 tetrahedra,  a cornercorner with one C(6)N4 tetrahedra, corners with two equivalent C(4)N4 tetrahedra, and  an edgeedge with one B(3)N4 tetrahedra. In the third C site, C(3) is bonded to one N(1), one N(10), one N(5), and one N(8) atom to form CN4 tetrahedra that share  a cornercorner with one B(1)N4 tetrahedra,  a cornercorner with one B(3)N4 tetrahedra,  a cornercorner with one C(1)N4 tetrahedra,  a cornercorner with one C(6)N4 tetrahedra, corners with two equivalent B(2)N4 tetrahedra, and corners with two equivalent C(5)N4 tetrahedra. In the fourth C site, C(4) is bonded to one N(3), one N(4), one N(6), and one N(7) atom to form CN4 tetrahedra that share  a cornercorner with one B(3)N4 tetrahedra,  a cornercorner with one C(1)N4 tetrahedra,  a cornercorner with one C(6)N4 tetrahedra, corners with two equivalent B(1)N4 tetrahedra, and corners with two equivalent C(2)N4 tetrahedra. In the fifth C site, C(5) is bonded to one N(1), one N(11), one N(5), and one N(9) atom to form CN4 tetrahedra that share  a cornercorner with one B(2)N4 tetrahedra,  a cornercorner with one C(1)N4 tetrahedra,  a cornercorner with one C(2)N4 tetrahedra, corners with two equivalent C(3)N4 tetrahedra, and corners with three equivalent B(3)N4 tetrahedra. In the sixth C site, C(6) is bonded to one N(12), one N(2), one N(3), and one N(8) atom to form CN4 tetrahedra that share  a cornercorner with one B(2)N4 tetrahedra,  a cornercorner with one C(1)N4 tetrahedra,  a cornercorner with one C(2)N4 tetrahedra,  a cornercorner with one C(3)N4 tetrahedra,  a cornercorner with one C(4)N4 tetrahedra, and corners with three equivalent B(1)N4 tetrahedra. There are twelve inequivalent N sites. In the first N site, N(1) is bonded in a trigonal non-coplanar geometry to one B(4), one C(3), and one C(5) atom. In the second N site, N(2) is bonded in a trigonal non-coplanar geometry to one B(2), one C(1), and one C(6) atom. In the third N site, N(3) is bonded in a tetrahedral geometry to one B(1), one B(4), one C(4), and one C(6) atom. In the fourth N site, N(4) is bonded in a trigonal non-coplanar geometry to one B(4), one C(2), and one C(4) atom. In the fifth N site, N(5) is bonded in a trigonal planar geometry to one B(3), one C(3), and one C(5) atom. In the sixth N site, N(6) is bonded in a trigonal planar geometry to one B(1), one C(1), and one C(4) atom. In the seventh N site, N(7) is bonded in a trigonal non-coplanar geometry to one B(3), one C(2), and one C(4) atom. In the eighth N site, N(8) is bonded in a trigonal non-coplanar geometry to one B(1), one C(3), and one C(6) atom. In the ninth N site, N(9) is bonded in a trigonal non-coplanar geometry to one B(3), one C(1), and one C(5) atom. In the tenth N site, N(10) is bonded to two equivalent B(2), one C(1), and one C(3) atom to form a mixture of edge and corner-sharing NB2C2 tetrahedra. In the eleventh N site, N(11) is bonded to one B(2), one B(3), one C(2), and one C(5) atom to form corner-sharing NB2C2 tetrahedra. In the twelfth N site, N(12) is bonded in a trigonal planar geometry to one B(1), one C(2), and one C(6) atom. is represented by the CIF file [CIF]
data_B2(CN2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.871
_cell_length_b   6.714
_cell_length_c   8.716
_cell_angle_alpha   91.000
_cell_angle_beta   90.227
_cell_angle_gamma   101.402
_symmetry_Int_Tables_number   1
_cell_volume   279.418
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  B  B0  1  0.214  0.891  0.417  1.0
  B  B1  1  0.127  0.948  0.912  1.0
  B  B2  1  0.786  0.109  0.583  1.0
  B  B3  1  0.873  0.052  0.088  1.0
  B  B4  1  0.710  0.393  0.161  1.0
  B  B5  1  0.290  0.607  0.839  1.0
  B  B6  1  0.340  0.578  0.330  1.0
  B  B7  1  0.660  0.422  0.670  1.0
  C  C8  1  0.393  0.066  0.184  1.0
  C  C9  1  0.057  0.725  0.658  1.0
  C  C10  1  0.959  0.279  0.840  1.0
  C  C11  1  0.556  0.730  0.586  1.0
  C  C12  1  0.215  0.385  0.088  1.0
  C  C13  1  0.943  0.275  0.342  1.0
  C  C14  1  0.041  0.721  0.160  1.0
  C  C15  1  0.740  0.902  0.327  1.0
  C  C16  1  0.607  0.934  0.816  1.0
  C  C17  1  0.444  0.270  0.414  1.0
  C  C18  1  0.785  0.615  0.912  1.0
  C  C19  1  0.260  0.098  0.673  1.0
  N  N20  1  0.738  0.406  0.827  1.0
  N  N21  1  0.370  0.046  0.823  1.0
  N  N22  1  0.514  0.236  0.583  1.0
  N  N23  1  0.223  0.387  0.398  1.0
  N  N24  1  0.184  0.407  0.923  1.0
  N  N25  1  0.262  0.594  0.173  1.0
  N  N26  1  0.668  0.919  0.659  1.0
  N  N27  1  0.486  0.764  0.417  1.0
  N  N28  1  0.816  0.593  0.077  1.0
  N  N29  1  0.290  0.615  0.659  1.0
  N  N30  1  0.630  0.954  0.177  1.0
  N  N31  1  0.035  0.219  0.686  1.0
  N  N32  1  0.442  0.267  0.111  1.0
  N  N33  1  0.777  0.613  0.602  1.0
  N  N34  1  0.864  0.066  0.910  1.0
  N  N35  1  0.040  0.736  0.844  1.0
  N  N36  1  0.332  0.081  0.341  1.0
  N  N37  1  0.845  0.086  0.417  1.0
  N  N38  1  0.136  0.934  0.090  1.0
  N  N39  1  0.960  0.264  0.156  1.0
  N  N40  1  0.710  0.385  0.341  1.0
  N  N41  1  0.155  0.914  0.583  1.0
  N  N42  1  0.965  0.781  0.314  1.0
  N  N43  1  0.558  0.733  0.889  1.0
[/CIF]
.
The crystal structure described by B2(CN2)3 crystallizes in the triclinic P-1 space group. There are four inequivalent B sites. In the first B site, B(1) is bonded to one N(12), one N(3), one N(6), and one N(8) atom to form BN4 tetrahedra that share  a cornercorner with one C(1)N4 tetrahedra,  a cornercorner with one C(2)N4 tetrahedra,  a cornercorner with one C(3)N4 tetrahedra, corners with two equivalent C(4)N4 tetrahedra, and corners with three equivalent C(6)N4 tetrahedra. In the second B site, B(2) is bonded to one N(11), one N(2), and two equivalent N(10) atoms to form BN4 tetrahedra that share  a cornercorner with one B(3)N4 tetrahedra,  a cornercorner with one C(2)N4 tetrahedra,  a cornercorner with one C(5)N4 tetrahedra,  a cornercorner with one C(6)N4 tetrahedra, corners with two equivalent C(3)N4 tetrahedra, corners with three equivalent C(1)N4 tetrahedra, and  an edgeedge with one B(2)N4 tetrahedra. In the third B site, B(3) is bonded to one N(11), one N(5), one N(7), and one N(9) atom to form BN4 tetrahedra that share  a cornercorner with one B(2)N4 tetrahedra,  a cornercorner with one C(1)N4 tetrahedra,  a cornercorner with one C(3)N4 tetrahedra,  a cornercorner with one C(4)N4 tetrahedra, corners with three equivalent C(5)N4 tetrahedra, and  an edgeedge with one C(2)N4 tetrahedra. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one N(1), one N(3), and one N(4) atom. There are six inequivalent C sites. In the first C site, C(1) is bonded to one N(10), one N(2), one N(6), and one N(9) atom to form CN4 tetrahedra that share  a cornercorner with one B(1)N4 tetrahedra,  a cornercorner with one B(3)N4 tetrahedra,  a cornercorner with one C(3)N4 tetrahedra,  a cornercorner with one C(4)N4 tetrahedra,  a cornercorner with one C(5)N4 tetrahedra,  a cornercorner with one C(6)N4 tetrahedra, and corners with three equivalent B(2)N4 tetrahedra. In the second C site, C(2) is bonded to one N(11), one N(12), one N(4), and one N(7) atom to form CN4 tetrahedra that share  a cornercorner with one B(1)N4 tetrahedra,  a cornercorner with one B(2)N4 tetrahedra,  a cornercorner with one C(5)N4 tetrahedra,  a cornercorner with one C(6)N4 tetrahedra, corners with two equivalent C(4)N4 tetrahedra, and  an edgeedge with one B(3)N4 tetrahedra. In the third C site, C(3) is bonded to one N(1), one N(10), one N(5), and one N(8) atom to form CN4 tetrahedra that share  a cornercorner with one B(1)N4 tetrahedra,  a cornercorner with one B(3)N4 tetrahedra,  a cornercorner with one C(1)N4 tetrahedra,  a cornercorner with one C(6)N4 tetrahedra, corners with two equivalent B(2)N4 tetrahedra, and corners with two equivalent C(5)N4 tetrahedra. In the fourth C site, C(4) is bonded to one N(3), one N(4), one N(6), and one N(7) atom to form CN4 tetrahedra that share  a cornercorner with one B(3)N4 tetrahedra,  a cornercorner with one C(1)N4 tetrahedra,  a cornercorner with one C(6)N4 tetrahedra, corners with two equivalent B(1)N4 tetrahedra, and corners with two equivalent C(2)N4 tetrahedra. In the fifth C site, C(5) is bonded to one N(1), one N(11), one N(5), and one N(9) atom to form CN4 tetrahedra that share  a cornercorner with one B(2)N4 tetrahedra,  a cornercorner with one C(1)N4 tetrahedra,  a cornercorner with one C(2)N4 tetrahedra, corners with two equivalent C(3)N4 tetrahedra, and corners with three equivalent B(3)N4 tetrahedra. In the sixth C site, C(6) is bonded to one N(12), one N(2), one N(3), and one N(8) atom to form CN4 tetrahedra that share  a cornercorner with one B(2)N4 tetrahedra,  a cornercorner with one C(1)N4 tetrahedra,  a cornercorner with one C(2)N4 tetrahedra,  a cornercorner with one C(3)N4 tetrahedra,  a cornercorner with one C(4)N4 tetrahedra, and corners with three equivalent B(1)N4 tetrahedra. There are twelve inequivalent N sites. In the first N site, N(1) is bonded in a trigonal non-coplanar geometry to one B(4), one C(3), and one C(5) atom. In the second N site, N(2) is bonded in a trigonal non-coplanar geometry to one B(2), one C(1), and one C(6) atom. In the third N site, N(3) is bonded in a tetrahedral geometry to one B(1), one B(4), one C(4), and one C(6) atom. In the fourth N site, N(4) is bonded in a trigonal non-coplanar geometry to one B(4), one C(2), and one C(4) atom. In the fifth N site, N(5) is bonded in a trigonal planar geometry to one B(3), one C(3), and one C(5) atom. In the sixth N site, N(6) is bonded in a trigonal planar geometry to one B(1), one C(1), and one C(4) atom. In the seventh N site, N(7) is bonded in a trigonal non-coplanar geometry to one B(3), one C(2), and one C(4) atom. In the eighth N site, N(8) is bonded in a trigonal non-coplanar geometry to one B(1), one C(3), and one C(6) atom. In the ninth N site, N(9) is bonded in a trigonal non-coplanar geometry to one B(3), one C(1), and one C(5) atom. In the tenth N site, N(10) is bonded to two equivalent B(2), one C(1), and one C(3) atom to form a mixture of edge and corner-sharing NB2C2 tetrahedra. In the eleventh N site, N(11) is bonded to one B(2), one B(3), one C(2), and one C(5) atom to form corner-sharing NB2C2 tetrahedra. In the twelfth N site, N(12) is bonded in a trigonal planar geometry to one B(1), one C(2), and one C(6) atom. is represented by the CIF file [CIF]
data_B2(CN2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.871
_cell_length_b   6.714
_cell_length_c   8.716
_cell_angle_alpha   91.000
_cell_angle_beta   90.227
_cell_angle_gamma   101.402
_symmetry_Int_Tables_number   1
_cell_volume   279.418
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  B  B0  1  0.214  0.891  0.417  1.0
  B  B1  1  0.127  0.948  0.912  1.0
  B  B2  1  0.786  0.109  0.583  1.0
  B  B3  1  0.873  0.052  0.088  1.0
  B  B4  1  0.710  0.393  0.161  1.0
  B  B5  1  0.290  0.607  0.839  1.0
  B  B6  1  0.340  0.578  0.330  1.0
  B  B7  1  0.660  0.422  0.670  1.0
  C  C8  1  0.393  0.066  0.184  1.0
  C  C9  1  0.057  0.725  0.658  1.0
  C  C10  1  0.959  0.279  0.840  1.0
  C  C11  1  0.556  0.730  0.586  1.0
  C  C12  1  0.215  0.385  0.088  1.0
  C  C13  1  0.943  0.275  0.342  1.0
  C  C14  1  0.041  0.721  0.160  1.0
  C  C15  1  0.740  0.902  0.327  1.0
  C  C16  1  0.607  0.934  0.816  1.0
  C  C17  1  0.444  0.270  0.414  1.0
  C  C18  1  0.785  0.615  0.912  1.0
  C  C19  1  0.260  0.098  0.673  1.0
  N  N20  1  0.738  0.406  0.827  1.0
  N  N21  1  0.370  0.046  0.823  1.0
  N  N22  1  0.514  0.236  0.583  1.0
  N  N23  1  0.223  0.387  0.398  1.0
  N  N24  1  0.184  0.407  0.923  1.0
  N  N25  1  0.262  0.594  0.173  1.0
  N  N26  1  0.668  0.919  0.659  1.0
  N  N27  1  0.486  0.764  0.417  1.0
  N  N28  1  0.816  0.593  0.077  1.0
  N  N29  1  0.290  0.615  0.659  1.0
  N  N30  1  0.630  0.954  0.177  1.0
  N  N31  1  0.035  0.219  0.686  1.0
  N  N32  1  0.442  0.267  0.111  1.0
  N  N33  1  0.777  0.613  0.602  1.0
  N  N34  1  0.864  0.066  0.910  1.0
  N  N35  1  0.040  0.736  0.844  1.0
  N  N36  1  0.332  0.081  0.341  1.0
  N  N37  1  0.845  0.086  0.417  1.0
  N  N38  1  0.136  0.934  0.090  1.0
  N  N39  1  0.960  0.264  0.156  1.0
  N  N40  1  0.710  0.385  0.341  1.0
  N  N41  1  0.155  0.914  0.583  1.0
  N  N42  1  0.965  0.781  0.314  1.0
  N  N43  1  0.558  0.733  0.889  1.0
[/CIF]
.