CdBC18H15(N4O)2 crystallizes in the monoclinic P2_1/c space group. Cd(1) is bonded in an octahedral geometry to one N(2), one N(6), one N(7), one N(8), one O(1), and one O(2) atom. The Cd(1)-N(2) bond length is 2.33 Å. The Cd(1)-N(6) bond length is 2.36 Å. The Cd(1)-N(7) bond length is 2.33 Å. The Cd(1)-N(8) bond length is 2.31 Å. The Cd(1)-O(1) bond length is 2.38 Å. The Cd(1)-O(2) bond length is 2.44 Å. B(1) is bonded in a tetrahedral geometry to one N(1), one N(3), one N(4), and one N(5) atom. The B(1)-N(1) bond length is 1.55 Å. The B(1)-N(3) bond length is 1.54 Å. The B(1)-N(4) bond length is 1.55 Å. The B(1)-N(5) bond length is 1.56 Å. There are eighteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(8), one N(8), and one H(1) atom. The C(1)-C(8) bond length is 1.36 Å. The C(1)-N(8) bond length is 1.39 Å. The C(1)-H(1) bond length is 0.95 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(5), one N(2), and one H(2) atom. The C(2)-C(5) bond length is 1.35 Å. The C(2)-N(2) bond length is 1.38 Å. The C(2)-H(2) bond length is 0.95 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one N(3), one N(6), and one H(3) atom. The C(3)-N(3) bond length is 1.37 Å. The C(3)-N(6) bond length is 1.32 Å. The C(3)-H(3) bond length is 0.95 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one N(1), one N(8), and one H(4) atom. The C(4)-N(1) bond length is 1.35 Å. The C(4)-N(8) bond length is 1.32 Å. The C(4)-H(4) bond length is 0.95 Å. In the fifth C site, C(5) is bonded in a 3-coordinate geometry to one C(2), one N(5), and one H(5) atom. The C(5)-N(5) bond length is 1.39 Å. The C(5)-H(5) bond length is 0.95 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one N(2), one N(5), and one H(6) atom. The C(6)-N(2) bond length is 1.33 Å. The C(6)-N(5) bond length is 1.36 Å. The C(6)-H(6) bond length is 0.95 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(12), one N(3), and one H(7) atom. The C(7)-C(12) bond length is 1.35 Å. The C(7)-N(3) bond length is 1.38 Å. The C(7)-H(7) bond length is 0.95 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(1), one N(1), and one H(8) atom. The C(8)-N(1) bond length is 1.39 Å. The C(8)-H(8) bond length is 0.95 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one N(4), one N(7), and one H(9) atom. The C(9)-N(4) bond length is 1.36 Å. The C(9)-N(7) bond length is 1.32 Å. The C(9)-H(9) bond length is 0.95 Å. In the tenth C site, C(10) is bonded in a distorted single-bond geometry to one C(11), one C(13), and one H(10) atom. The C(10)-C(11) bond length is 1.42 Å. The C(10)-C(13) bond length is 1.37 Å. The C(10)-H(10) bond length is 0.95 Å. In the eleventh C site, C(11) is bonded in a trigonal planar geometry to one C(10), one C(11), and one C(18) atom. The C(11)-C(11) bond length is 1.42 Å. The C(11)-C(18) bond length is 1.41 Å. In the twelfth C site, C(12) is bonded in a distorted trigonal planar geometry to one C(7), one N(6), and one H(11) atom. The C(12)-N(6) bond length is 1.37 Å. The C(12)-H(11) bond length is 0.95 Å. In the thirteenth C site, C(13) is bonded in a trigonal planar geometry to one C(10), one C(14), and one C(17) atom. The C(13)-C(14) bond length is 1.43 Å. The C(13)-C(17) bond length is 1.50 Å. In the fourteenth C site, C(14) is bonded in a distorted single-bond geometry to one C(13) and one H(12) atom. The C(14)-H(12) bond length is 0.95 Å. In the fifteenth C site, C(15) is bonded in a distorted trigonal planar geometry to one C(16), one N(7), and one H(13) atom. The C(15)-C(16) bond length is 1.36 Å. The C(15)-N(7) bond length is 1.38 Å. The C(15)-H(13) bond length is 0.95 Å. In the sixteenth C site, C(16) is bonded in a distorted bent 120 degrees geometry to one C(15), one N(4), and one H(14) atom. The C(16)-N(4) bond length is 1.38 Å. The C(16)-H(14) bond length is 0.95 Å. In the seventeenth C site, C(17) is bonded in a bent 120 degrees geometry to one C(13), one O(1), and one O(2) atom. The C(17)-O(1) bond length is 1.27 Å. The C(17)-O(2) bond length is 1.25 Å. In the eighteenth C site, C(18) is bonded in a single-bond geometry to one C(11) and one H(15) atom. The C(18)-H(15) bond length is 0.95 Å. There are eight inequivalent N sites. In the first N site, N(3) is bonded in a trigonal planar geometry to one B(1), one C(3), and one C(7) atom. In the second N site, N(4) is bonded in a trigonal planar geometry to one B(1), one C(16), and one C(9) atom. In the third N site, N(5) is bonded in a trigonal planar geometry to one B(1), one C(5), and one C(6) atom. In the fourth N site, N(6) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(12), and one C(3) atom. In the fifth N site, N(7) is bonded in a trigonal planar geometry to one Cd(1), one C(15), and one C(9) atom. In the sixth N site, N(8) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(1), and one C(4) atom. In the seventh N site, N(1) is bonded in a trigonal planar geometry to one B(1), one C(4), and one C(8) atom. In the eighth N site, N(2) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(2), and one C(6) atom. There are fifteen inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(4) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(5) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(6) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(7) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(8) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(9) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(10) atom. In the eleventh H site, H(11) is bonded in a single-bond geometry to one C(12) atom. In the twelfth H site, H(12) is bonded in a single-bond geometry to one C(14) atom. In the thirteenth H site, H(13) is bonded in a single-bond geometry to one C(15) atom. In the fourteenth H site, H(14) is bonded in a single-bond geometry to one C(16) atom. In the fifteenth H site, H(15) is bonded in a single-bond geometry to one C(18) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted L-shaped geometry to one Cd(1) and one C(17) atom. In the second O site, O(2) is bonded in a distorted L-shaped geometry to one Cd(1) and one C(17) atom. Linkers: 2 [O]C(=O)c1ccc2cc(C([O])=O)ccc2c1 ,4 c1ncn(c1)[B](n1cncc1)(n1cncc1)n1cncc1. Metal clusters: 4 [C]1O[Cd]O1. The MOF has largest included sphere 5.06 A, density 1.28 g/cm3, surface area 4287.32 m2/g, accessible volume 0.32 cm3/g