1. Lithio(diphenylphosphino)methane-tetramethylethylenediamine: crystal structure and NMR studies of a coordinatively unsaturated, monomeric organolithium
2. Synthesis of α-, γ-phosphorus functionalized alkyl lithium species; X-ray structures of [{Li(L)(Ch2PMeR)}2][L =NNN′N′-tetramethylethylenediamine (tmen), R = Me or Ph; L =(–)sparteine, R = Ph] and [Li(tmen){CH(SiMe3)C6H4PPh2-o}]
3. Structures and stabilities of α-hetero-substituted organolithium and organosodium compounds. Energetic unimportance of d-orbital effects
4. The unit cell parameters and the atomic coordinates reported previously are in agreement with our determination. Crystal data for [Li(TMEDA)CH2PPh2]2(1): C38H56Li2N4P2,Mr= 322.34 g, crystals grown from toluene/hexane at −20 °C, space groupP1̄, (No. 2),a= 10.1723(12) Å,b= 10.9213(13) Å,c= 11.3514(13) Å, α = 61.258(2)°, β = 65.620(2)°, γ = 68.748(2)°,V= 985.7(2) Å3,Z= 1,dcalcd= 1.086 g cm-3, μ(Mo Kα) = 0.139 mm-1. Data (Mo Kα = 0.710 73 Å) were collected with a Siemens CCD at 200(2) K; 93 reflections (2ϑ range 4−47°) were used for determination of the unit cell parameters. The structure was solved by direct methods (SHELXS-86)5and subsequent difference Fourier syntheses and refined by least-squares techniques (SHELXL-93)5. Final R1 = 0.0549 and wR2 = 0.1300 (for reflections withI> 2σ(I)); R1 = 0.0865, and wR2 = 0.1473 (all data).