Sn3O(O3PC5H4N)2 crystallizes in the triclinic P-1 space group. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to one N(1), one O(1), one O(2), and one O(4) atom. The Sn(1)-N(1) bond length is 2.70 Å. The Sn(1)-O(1) bond length is 2.15 Å. The Sn(1)-O(2) bond length is 2.28 Å. The Sn(1)-O(4) bond length is 2.11 Å. In the second Sn site, Sn(2) is bonded in a 4-coordinate geometry to one N(2), one O(4), one O(6), and one O(7) atom. The Sn(2)-N(2) bond length is 2.56 Å. The Sn(2)-O(4) bond length is 2.11 Å. The Sn(2)-O(6) bond length is 2.31 Å. The Sn(2)-O(7) bond length is 2.16 Å. In the third Sn site, Sn(3) is bonded in a distorted T-shaped geometry to one O(3), one O(4), and one O(5) atom. The Sn(3)-O(3) bond length is 2.19 Å. The Sn(3)-O(4) bond length is 2.12 Å. The Sn(3)-O(5) bond length is 2.15 Å. There are ten inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(1) atom. The C(1)-N(1) bond length is 1.34 Å. The C(1)-H(1) bond length is 1.09 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(3) and one H(2) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-H(2) bond length is 1.09 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one P(1) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-P(1) bond length is 1.82 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one H(3) atom. The C(4)-C(5) bond length is 1.39 Å. The C(4)-H(3) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one N(1), and one H(4) atom. The C(5)-N(1) bond length is 1.34 Å. The C(5)-H(4) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(7), one N(2), and one H(5) atom. The C(6)-C(7) bond length is 1.39 Å. The C(6)-N(2) bond length is 1.34 Å. The C(6)-H(5) bond length is 1.09 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(6), one C(8), and one H(6) atom. The C(7)-C(8) bond length is 1.40 Å. The C(7)-H(6) bond length is 1.09 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(7), one C(9), and one P(2) atom. The C(8)-C(9) bond length is 1.40 Å. The C(8)-P(2) bond length is 1.82 Å. In the ninth C site, C(9) is bonded in a distorted single-bond geometry to one C(10), one C(8), and one H(7) atom. The C(9)-C(10) bond length is 1.39 Å. The C(9)-H(7) bond length is 1.09 Å. In the tenth C site, C(10) is bonded in a distorted trigonal planar geometry to one C(9), one N(2), and one H(8) atom. The C(10)-N(2) bond length is 1.34 Å. The C(10)-H(8) bond length is 1.09 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one C(3), one O(1), one O(2), and one O(3) atom. The P(1)-O(1) bond length is 1.55 Å. The P(1)-O(2) bond length is 1.53 Å. The P(1)-O(3) bond length is 1.54 Å. In the second P site, P(2) is bonded in a distorted tetrahedral geometry to one C(8), one O(5), one O(6), and one O(7) atom. The P(2)-O(5) bond length is 1.54 Å. The P(2)-O(6) bond length is 1.53 Å. The P(2)-O(7) bond length is 1.55 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted bent 120 degrees geometry to one Sn(1), one C(1), and one C(5) atom. In the second N site, N(2) is bonded in a distorted bent 120 degrees geometry to one Sn(2), one C(10), and one C(6) atom. There are eight 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(4) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(5) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(6) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(7) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(9) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(10) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Sn(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sn(1) and one P(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Sn(3) and one P(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Sn(1), one Sn(2), and one Sn(3) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Sn(3) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Sn(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Sn(2) and one P(2) atom. Linkers: 4 [O]P([O])(=O)c1ccncc1. Metal clusters: 6 [Sn]. The MOF has largest included sphere 1.94 A, density 2.82 g/cm3, surface area 2182.75 m2/g, accessible volume 0.05 cm3/g