Carbaborane derivatives of the late- and post-transition elements. Part 3. Structural consequences of ligand substitution in palladadicarbadodecaboranes 3-L2-3,1,2-PdC2B9H11. The crystal and molecular structures of 3-[Me2N(CH2)2NMe2]-3,1,2-PdC2B9H11 and 3-(PMe3)2-3,1,2-PdC2B9H11
- 1 January 1985
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 4,p. 761-769
- https://doi.org/10.1039/dt9850000761
Abstract
The action of Tl+[3,1,2-TlC2B9H11]– on [PdCl2(tmen)][tmen = Me2N(CH2)2NMe2] yields the aminometallacarbaborane 3-(tmen)-3,1,2-PdC2B9H11(1) which possesses a ‘slipped’ structure, as shown by a single-crystal X-ray study [Pd–B 2.182(6), 2.202(5), and 2.182(6)Å and Pd–C 2.608(4) and 2.623(4)Å; a= 8.474 5(12), b= 12.363 6(19), c= 16.775 9(26)Å, β= 109.14(1)°, R= 0.03 for 2 070 independent observed reflections]. The diamine ligand may be displaced from complex (1) by cyclo-octa-1,5-diene, in the presence of HCl, and by trimethylphosphine, which in turn is displaced by trimethyl phosphite yielding the complexes 3-L2-3,1,2-PdC2B9H11{L2= 1,5-C8H12, (PMe3)2(2), or [P(OMe)3]2}. The 11B n.m.r. spectra are consistent with a more symmetrical structure for complex (2) than for (1) and this has been confirmed by an X-ray study which shows Pd–B 2.260(5), 2.315(5), and 2.249(4)Å, and Pd–C 2.414(4) and 2.492(4)Å; a= 6.718 3(10), b= 15.502 4(18), c= 17.918 4(24), β= 101.90(1)°, R= 0.026 for 2 214 independent observed reflections.Keywords
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