Very Large Changes in Bond Length and Bond Angle in a Heavy Group 14 Element Alkyne Analogue by Modification of a Remote Ligand Substituent.

Roland C. Fischer, Lihung Pu, James C. Fettinger, Marcin A. Brynda, Philip P. Power

Research output: Contribution to journalArticlepeer-review


The synthesis and characterization of the compd. Me3Si-4-Ar'SnSnAr'-4-SiMe3 (Ar'-4-SiMe3 = C6H2-2,6-(C6H3-2,6-i-Pr2)2-4-SiMe3) shows that it has a Sn-Sn bond length = 3.066(1) Å and a Sn-Sn-C bending angle of 99.25(14)°. These parameters differ by ∼0.4 Å and ∼26° from those previously reported for the closely related Ar'SnSnAr' (Ar' = C6H3-2,6-(C6H3-2,6-i-Pr2)2). In accordance with the theor. predictions by Nagase and Takagi, very small amts. of energy (∼5 kcal mol-1) sep. structural isomers of distannynes that have large differences in their bonding parameters. [on SciFinder(R)]
Original languageEnglish
Pages (from-to)11366-11367
Number of pages2
JournalJournal of the American Chemical Society
Issue number35
Publication statusPublished - 2006

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