A New Octadecanuclear Copper(II)‐Lanthanide(III) Cluster Complex: Synthesis and Structural Characterization of [Cu₁₂Nd₆(OH)₂₄(betaine)₁₆(NO₃)₃(H₂O)₁₀](NO₃)[PF₆]₁₄·5H₂O

Abstract

Abstract The new octadecanuclear Cu‐Ln complex, [Cu 12 Nd 6 (OH) 24 (betaine) 16 (NO 3 ) 3 (H 2 O) 10 ](NO 3 )[PF 6 ] 14 ·5H 2 O, was synthesized, which crystallizes in triclinic P 1¯ space group, a = 18.649(6)Å, b = 20.363(7)Å, c = 19.865(7)Å, α = 116.61(2)°, β = 91.99(2)°, γ = 117.93(2)°, V = 5666(3)Å 3 . Its crystal structure features a [Cu 12 Nd 6 (OH) 24 (betaine) 16 (NO 3 ) 3 (H 2 O) 10 ] 15+ core of pseudocubic O h symmetry, with the six Nd ions positioned at the vertices of a regular octahedron and the twelve Cu ions located at the midpoints of the twelve octahedral edges. The Cu‐Nd metal framework may be viewed as a cuboctahedron, which is interconnected by twenty‐four μ 3 ‐OH bridges that are each linked to one Nd ion and two Cu ions. In the centre of metal polyhedron, there is an encapsulated NO 3 — anion that exhibits a multi‐ coordinating mode.