A dodecaholmium wheel of [Ho12(L)6(mal) 4(AcO)4(H2O)14] (1; mal = malonate) was synthesized by using p-/tert-butylsulfonylcalixarene (H4L) as a cluster-forming ligand. The wheel consists of three fragments of mononuclear A3- ([Ho(L)(mal)-(H2O)]3-), trinuclear B 3- ([Ho(H2O)2 (mal)(Ho(L)(AcO)) 2]3-), and C3+ ([Ho(H2O) 2]3+), and an alternate arrangement of these fragments (A3--C3+_B3-_C3+_A 3-_C3+_B3-_c3+_)resuits in a wheel structure. The longest and shortest diameters of the core were estimated to be 17.7562(16) and 13.6810(13) Å, respectively, and the saddle-shaped molecule possesses a pocketlike cavity inside.
ASJC Scopus subject areas
- Organic Chemistry