Synthesis and characterization of some organo-all-tin dendrimers with different peripheral substituents

Schumann H., AKSU Y., Wassermann B. C.

JOURNAL OF ORGANOMETALLIC CHEMISTRY, cilt.691, sa.8, ss.1703-1712, 2006 (SCI-Expanded)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 691 Sayı: 8
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1016/j.jorganchem.2005.11.012
  • Dergi Adı: JOURNAL OF ORGANOMETALLIC CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1703-1712
  • Anahtar Kelimeler: organotin compounds, dendrimers, organotin hydride, iron, cobalt, manganese, CASCADE MOLECULES, SITE-ISOLATION, COMPLEXES
  • Akdeniz Üniversitesi Adresli: Hayır

Özet

The synthesis of the first all-tin-dendrimer Sn[(CH2)(4)SnPh3](4) (2) results from complete hydrostannation of tetra(but-3-enyl)stannane (1) with triphenyltin hydride. Selective cleavage of one phenyl group from each dendron of 2 with anhydrous HCI results in Sn[(CH2)(4)Sn(Cl)Ph-2](4) (3), which on treatment with LiAlH4 yields the corresponding hydride derivative Sn[(CH2)(4)Sn(H)Ph-2](4) (4) containing four reactive Sn-H bonds. The cyclopentadienyl derivative Sn[(CH2)(4)Sn(C5H5)Ph-2](4) (5) as well as the transition metal substituted derivatives Sn[(CH2)(4)Sn{Co(CO)(4)}Ph-2](4) (6), Sn[(CH2)(4)Sn{Fe(CO)(2)C5H5)Ph-2](4) (7), and Sn[(CH2)(4)Sn(Mn(CO)(5)}Ph-2](4) (8) have been prepared by coupling of 3 with the appropriate Grignard or sodium derivatives of the transition metal moieties. The new compounds were characterized by elemental analyses, IR, H-1-, C-13- and Sn-119 NMR spectroscopy and MALDI-TOF mass spectrometry. (c) 2005 Elsevier B.V. All rights reserved.

The synthesis of the first all-tin-dendrimer Sn[(CH2)(4)SnPh3](4) (2) results from complete hydrostannation of tetra(but-3-enyl)stannane (1) with triphenyltin hydride. Selective cleavage of one phenyl group from each dendron of 2 with anhydrous HCI results in Sn[(CH2)(4)Sn(Cl)Ph-2](4) (3), which on treatment with LiAlH4 yields the corresponding hydride derivative Sn[(CH2)(4)Sn(H)Ph-2](4) (4) containing four reactive Sn-H bonds. The cyclopentadienyl derivative Sn[(CH2)(4)Sn(C5H5)Ph-2](4) (5) as well as the transition metal substituted derivatives Sn[(CH2)(4)Sn{Co(CO)(4)}Ph-2](4) (6), Sn[(CH2)(4)Sn{Fe(CO)(2)C5H5)Ph-2](4) (7), and Sn[(CH2)(4)Sn(Mn(CO)(5)}Ph-2](4) (8) have been prepared by coupling of 3 with the appropriate Grignard or sodium derivatives of the transition metal moieties. The new compounds were characterized by elemental analyses, IR, H-1-, C-13- and Sn-119 NMR spectroscopy and MALDI-TOF mass spectrometry.