Synthesis and characterization of a stable bis-naphthyltin(II) compound. Bis[8-(dimethylamino)-1-naphthyl- C, N]tin(II) and its W(CO) 5 adduct

• Published in: Journal of organometallic chemistry Vol. 367; no. 1; pp. 55 - 68
• Main Authors: Jastrzebski, Johann T.B.H., van der Schaaf, Paul A., Boersma, Jaap, Koten, Gerard van, Heijdenrijk, Dick, Goubitz, Kees, de Ridder, Dirk J.A.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 09.05.1989; Elsevier Science
• Subjects: Chemistry; Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Organic chemistry; Organic compounds; Organometalloidal and organometallic compounds; Physics; Preparations and properties; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Transition metals derivatives
• ISSN: 0022-328X; 1872-8561
• DOI: 10.1016/0022-328X(89)87205-5

Reaction of [8-(dimethylamino)-1-naphthyl- C, N]lithium with SnCl 2 affords the new monomeric stannylene bis[8-(dimethylamino)-1-naphthyl- C, N]tin(II) ( 3). The reaction between W(CO) 5(NME 3) and 3 yields {bis[8-(dimethylamino)-1-naphthyl- C, N]tin(II)} tungsten pentacarbonyl ( 4). The crystal structures of 3 and 4 have been determined by X-ray diffraction methods. 3: C 24H 24N 2Sn, orthorhombic, space group Pbca with a 22.383(4), b 30.865(5), c 12.127(2) Å and Z = 16, final R = 0.067 for 4983 observed reflections. 4: C 29H 24N 2O 5SnW, a 12.509(3), b 15.191(1), c 9.780(1) Å, α 98.42(1), β 104.33(1), γ 107.27(1)°, space group P 1 , Z = 2, triclinic; R = 0.046 for 7116 observed reflections. The geometry about tin in 3 is distorted ψ-trigonal bypyramidal, and that in 4 is distorted trigonal bipyramidal. In both 3 and 4 the 8-(dimethylamino)-1-naphthyl groups are C,N-chelate bonded, with the C(1) atoms at equatorial sites and the nitrogen atoms at axial sites. The Sn lone pair in 3 and the W(CO) 5 moiety in 4 occupy the remaining equatorial sites. 1H, 13C, and 119Sn solution NMR spectroscopic studies of 3 and 4 show that at low temperature (≤ − 15°C) they retain the structures found in the solid state. At higher temperatures fluxional processes become operative.