149326-85-2Relevant academic research and scientific papers
Synthesis and characterization of the monomeric gallium monoamides t-Bu2GaN(R)SiPh3 (R = t-Bu, 1-adamantyl), Trip2MN(H)Dipp (M = Al, Ga; Trip = 2,4,6-i-Pr3C6H2; Dipp = 2,6-i-Pr2C6H3), and Trip2GaNPh2
Waggoner,Ruhlandt-Senge,Wehmschulte,He,Olmstead,Power
, p. 2557 - 2561 (2008/10/08)
The synthesis and characterization of the monomeric, main group 3 monoamides t-Bu2GaN(R)(SiPh3) (R = t-Bu (1); R = 1-Adamantyl (1-Ad) (2)), Trip2MN(H)Dipp (M = Al (3); M = Ga (4)) (Trip = 2,4,6-i-Pr3C6H2, Dipp = 2,6-i-Pr2C6H3), and Trip2GaNPh2 (5) are described. The compounds were characterized by X-ray crystallography and 1H NMR and IR spectroscopy. The crystal structures show the molecules to be monomeric with trigonal planar metal and nitrogen coordination. The Ga-N bond lengths range from 1.847(12) ? in 4 to 1.924(2) ? in 2. The Al-N bond length observed in 3 is 1.784(3) ?. The variation may be explained mostly on the basis of different steric and electronic properties of the bulky ligands. It was concluded, on the basis of VT 1H NMR data, that the p-p π-bonding contribution to M-Nbond strength in the aluminum or gallium species is -1. Crystal data at 130 K, with Mo Kα (λ = 0.71069 ?) radiation, are as follows: t-Bu2GaN(t-Bu)SiPh3 (1), a = 14.795(6) ?, b = 9.807(6) ?, c = 19.657(9) ?, β = 99.39(4)°, V = 2824(1) ?3, space group P21/c, Z = 4, 2361 (I > 2σ(I)) data, R = 0.053; t-Bu2GaN(1-Ad)SiPh3 (2), a = 10.191(3) ?, b = 10.740(3) ?, c = 15.467(5) ?, α = 69.82(2)°, β = 82.79(2)°, γ = 82.75(2)°, V = 1568.4(8) ?3, space group P1, Z = 2, 5130 (I > 3σ (I)) data, R = 0.037; Trip2AlN(H)Dipp (3), a = 11.643(5) ?, b = 18.460(6) ?, c = 37.165(14) ?, β = 95.86(3)°, V = 7947(5) ?3, space group C2/c, Z = 8, 3639 (I > 2σ(I)) data, R = 0.056; Trip2GaN(H)Dipp (4), a = 11.588(8) ?, b = 18.496(14) ?, c = 37.27(2) ?, β = 95.17°, V = 7956(9) ?3, space group C2/c, Z = 8, 1837 (I > 2σ(I)) data, R = 0.084; Trip2GaNPh2 (5), a = 12.732(4) ?, b = 15.656(5) ?, c = 18.462(6) ?, V = 3680(2) ?3, space group Pccn, Z = 4, 1944 (I > 2σ(I)) data, R = 0.092.
