KC5H4S(NO)2CH(CH3)2 crystallizes in the orthorhombic P2_12_12_1 space group. The structure consists of four 02329_fluka molecules and eight 02329_fluka molecules inside a KC5H4S(NO)2 framework. In the KC5H4S(NO)2 framework, K(1) is bonded in a 4-coordinate geometry to two equivalent S(1), two equivalent O(1), and two equivalent O(2) atoms. There is one shorter (3.24 Å) and one longer (3.28 Å) K(1)-S(1) bond length. There is one shorter (2.70 Å) and one longer (2.89 Å) K(1)-O(1) bond length. There is one shorter (2.71 Å) and one longer (2.86 Å) K(1)-O(2) bond length. There are five inequivalent C sites. In the first C site, C(5) is bonded in a 3-coordinate geometry to one N(1), one H(2), and one H(3) atom. The C(5)-N(1) bond length is 1.47 Å. The C(5)-H(2) bond length is 1.09 Å. The C(5)-H(3) bond length is 1.09 Å. In the second C site, C(7) is bonded in a 3-coordinate geometry to one N(2), one H(7), and one H(8) atom. The C(7)-N(2) bond length is 1.47 Å. The C(7)-H(7) bond length is 1.09 Å. The C(7)-H(8) bond length is 1.09 Å. In the third C site, C(4) is bonded in a distorted bent 120 degrees geometry to one N(1) and one O(2) atom. The C(4)-N(1) bond length is 1.43 Å. The C(4)-O(2) bond length is 1.26 Å. In the fourth C site, C(1) is bonded in a distorted trigonal planar geometry to one N(1), one N(2), and one S(1) atom. The C(1)-N(1) bond length is 1.37 Å. The C(1)-N(2) bond length is 1.37 Å. The C(1)-S(1) bond length is 1.69 Å. In the fifth C site, C(2) is bonded in a distorted bent 120 degrees geometry to one N(2) and one O(1) atom. The C(2)-N(2) bond length is 1.43 Å. The C(2)-O(1) bond length is 1.26 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one C(1), one C(4), and one C(5) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one C(1), one C(2), and one C(7) atom. There are four inequivalent H sites. In the first H site, H(8) is bonded in a single-bond geometry to one C(7) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(5) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(5) atom. In the fourth H site, H(7) is bonded in a single-bond geometry to one C(7) atom. S(1) is bonded in a distorted single-bond geometry to two equivalent K(1) and one C(1) atom. There are two inequivalent O sites. In the first O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1) and one C(4) atom. In the second O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(1) and one C(2) atom. Linkers: 4 CCN1C(=O)[CH]C(=O)N(CC)C1=S. Metal clusters: 4 [K]. RCSR code: srs. The MOF has largest included sphere 1.85 A, density 1.55 g/cm3, surface area 3569.92 m2/g, accessible volume 0.10 cm3/g