Interaction of naphthaleneytterbium with tetraphenyltin. Molecular structure of Ph3SnYb(THF)2(μ-Ph)3Yb(THF)3

Article abstract of DOI:10.1016/0022-328X(91)86429-T

Reaction of naphthaleneytterbium with Ph4Sn in THF yields (Ph3Sn)2Yb(THF)4 and the heteroleptic complex Ph3SnYb(THF)2(μ-Ph)3Yb(THF)3 (1), which can be isolated by crystallization from THF/ether solution.The product 1 forms triclinic crystals in space group P<*>1 with a = 11.123(2), b = 14.078(3), c = 18.774(4) Angstroem, α = 101.94(2), β = 96.20(2), γ = 109.85(2) deg, Z = 2.Least-squares refinement on the basis of 4955 reflections led to a final R value of 0.027.The molecule of 1 contains two Yb atoms connected by three bridging Ph rings.One of Yb atoms is bonded with Ph3Sn unit (Sn-Yb bond length is 3.379(1) Angstroem) and two THF molecules.The second Yb atom is surrounded by three molecules of coordinated THF.Coordination of each ytterbium atom is distorted octahedron.The proposed reaction scheme includes two-electron oxidation of naphthaleneytterbium, formation of Ph3SnYbPh and PhYbPh intermediates and their following association.