TY - CONF
T1 - Synthesis and characterization of Sn-Sn multiple bonds using modified bulky terphenyl ligands.
AU - Peng, Yang
AU - Fischer, Roland C.
AU - Merrill, W. Alexander
AU - Fettinger, James C.
AU - Power, Philip P.
N1 - M1 - Copyright (C) 2017 American Chemical Society (ACS). All Rights Reserved.
CAPLUS AN 2008:952907(Conference; Meeting Abstract; Computer Optical Disk)
PY - 2008
Y1 - 2008
N2 - The heavier group 14 element alkyne analogs 4-X-Ar'SnSn-Ar'-4-X (4-X-Ar'= C6H2-4-X-2, 6-(C6H3-2,6-iPr)2, X = H, MeO, tBu, F, SiMe3 and GeMe3; 1, 2, 3, 4, 5, 6) have been isolated and characterized. They were prepd. by direct redn. of the corresponding aryltin (II) chloride precursors, ArSnCl with KC8. X-ray crystallog. showed that 1-4 have trans-bent structures with similar Sn-Sn bond distances [Sn-Sn = 2.67Å] and trans-bending angles [Sn-Sn-C = 125°]. In contrast, the structures of 5 and 6 differ dramatically from 1-4. The introduction of SiMe3 or GeMe3 at the para-position of the central aryl ring in 5 and 6 induces a strongly bent single bonded structure without alteration of the steric crowding near the tin center. The Sn-Sn distances [Sn-Sn = 3.07Å] are lengthened by ca 0.4 Å and the bending angles [Sn-Sn-C = 99.25°] are ca 26° narrower. The theor. calcns. show that relatively small amts. of energy sep. two different bonding modes of the tin alkyne analogs and suggest that changed packing forces in 5 and 6 cause the large structural changes. [on SciFinder(R)]
AB - The heavier group 14 element alkyne analogs 4-X-Ar'SnSn-Ar'-4-X (4-X-Ar'= C6H2-4-X-2, 6-(C6H3-2,6-iPr)2, X = H, MeO, tBu, F, SiMe3 and GeMe3; 1, 2, 3, 4, 5, 6) have been isolated and characterized. They were prepd. by direct redn. of the corresponding aryltin (II) chloride precursors, ArSnCl with KC8. X-ray crystallog. showed that 1-4 have trans-bent structures with similar Sn-Sn bond distances [Sn-Sn = 2.67Å] and trans-bending angles [Sn-Sn-C = 125°]. In contrast, the structures of 5 and 6 differ dramatically from 1-4. The introduction of SiMe3 or GeMe3 at the para-position of the central aryl ring in 5 and 6 induces a strongly bent single bonded structure without alteration of the steric crowding near the tin center. The Sn-Sn distances [Sn-Sn = 3.07Å] are lengthened by ca 0.4 Å and the bending angles [Sn-Sn-C = 99.25°] are ca 26° narrower. The theor. calcns. show that relatively small amts. of energy sep. two different bonding modes of the tin alkyne analogs and suggest that changed packing forces in 5 and 6 cause the large structural changes. [on SciFinder(R)]
M3 - (Old data) Lecture or Presentation
SP - INOR-256
ER -