Fig. 3: Single-crystal X-ray diffraction studies of [K2(THF)3]2+(3ˉ)2 and [K(THF)2(18-C-6)]+3ˉ at 100 K with thermal ellipsoids at the 50% probability.
![Fig. 3: Single-crystal X-ray diffraction studies of [K2(THF)3]2+(3ˉ)2 and [K(THF)2(18-C-6)]+3ˉ at 100 K with thermal ellipsoids at the 50% probability.](http://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41467-025-57660-6/MediaObjects/41467_2025_57660_Fig3_HTML.png?as=webp)
Hydrogen atoms are omitted for clarity. a Solid-state structure of [K2(THF)3]2+(3ˉ)2. Selected experimental bond lengths and angles: C(1)-P(1) 1.722(3) Å, C(2)-P(2) 1.721(3) Å, P(1)-P(3) 2.1834(10) Å, P(2)-P(3) 2.1894(10) Å, C(4)-P(4) 1.723(3) Å, C(5)-P(5) 1.725(3) Å, P(4)-P(6) 2.1673(10) Å, P(5)-P(6) 2.1892(10) Å, P(1)-K(1) 3.4989(10) Å, P(2)-K(1) 3.5161(10) Å, P(3)-K(1) 3.3514(10) Å, P(5)-K(1) 3.7625(10) Å, P(6)-K(1) 3.3502(10) Å, P(4)-K(2) 3.2241(10) Å, P(5)-K(2) 3.6342(11) Å; C(1)-P(1)-P(3) 110.26(10)°, P(1)-P(3)-P(2) 90.03(4)°, C(2)-P(2)-P(3) 109.25(10)°, C(4)-P(4)-P(6) 111.15(10)°, P(4)-P(5)-P(6) 90.03(4)°, C(5)-P(5)-P(6) 108.95(10)°. b Solid-state structure of [K(THF)2(18-C-6)]+3ˉ. Selected experimental bond lengths and angles: C(1)-P(1) 1.7165(10) Å, C(2)-P(2) 1.7126(9) Å, P(1)-P(3) 2.1785(3) Å, P(2)-P(3) 2.1742(3) Å, C(1)-P(1)-P(3) 108.69(3)°, P(1)-P(3)-P(2) 89.300(13)°, C(2)-P(2)-P(3) 109.00(3)°.
