1,3-diphenylamidine and methylaminopyridine compounds of gallium

Bimetallic Complexes from Amphoteric Group 13/15 Ligands: Syntheses and X-ray Crystal Structures

“…Comparable GaÀN bond lengths were reported for gallane/pyridine adducts such as [Me 2 Ga(Cl) 2 2-(methylamino)pyridine] (206.6(3) pm). [13] In agreement with the concept proposed by Haaland, the weakness of the dative Ga 2 N bond leads to a more planar geometry around the triel atom. [14] The sum of the bond angles around M (CÀMÀC and CÀMÀE) are 347.48 (1) and 347.…”

“…The resulting suspension was slowly warmed to 0 8C over 2 ± 3 h. After filtration, the resulting clear solution was concentrated to 15 mL and stored at À 30 8C for 24 h. The compounds were obtained as colorless to light yellow crystals, which slowly decomposed at room temperature. 2d)ÀH);13 C{ 1 H} NMR (75.5 MHz, [D 8 ]toluene, À 10 8C): d À 1.1 (d, 2 J PC 10.7 Hz; GaMe 2 ), 5.8 (d, 2 J PC 10.3 Hz; SiMe 3 ), 38.5 (NMe 2 ), 106.8 (C(3d)ÀH), 147.3 (C(2d)ÀH), 155.0 (C(4d)); 31 P NMR (121.5 MHz, C 6 D 6 , 308C): d À 273.8. [(dmap)Me 2 GaÀAs(SiMe 3 ) 2 ] (2): Light yellow crystals, yield: 0.68 g (1.7 mmol, 85 %); m.p.…”

A General Synthetic Pathway to Lewis Base-Stabilized, MonomericGroup 13/15 Compounds

“…In contrast, the GaϪN distance is much longer [206.6(2) pm], demonstrating the reduced Lewis acidity of the Et 2 Garelative to the Et 2 Al-fragment, but almost the same as in 2-(methyl)pyridineϪGa(Me 2 )Cl [206.6(3) pm]. [32] However, 4-(methyl)pyridineϪGa(Mes 2 )SeMes, which also contains a tricoordinated N base, shows a slightly longer GaϪN distance [209.5(3) pm], [33] while in the methylene-bridged compound Me 3 NϪGa(CH 2 CMe 2 )CH 2 P(Ph 2 )ϪCr(CO) 5 , which contains a tetracoordinated N center, the GaϪN distance is significantly increased [223.5(3) pm]. [10c] Very recently, Gladfelter et al described the synthesis of several quinuclidine-stabilized amido-and azidogallanes by the reaction of quinuclidine-stabilized dichlorogallane quinϪGa(H)Cl 2 with Li amides and azides.…”

Polysulfonylamine, CXIX Wasserstoffbrücken in kristallinen Onium-dimesylamiden: Ein antidromes Achtringmuster als robustes supramolekulares Synthon - Drei prototypische Strukturen/Polysulfonylamines, CXIX Hydrogen Bonding in Crystalline Onium Dimesylamides: An Antidromic Eight-Membered Ring Pattern as a Robust Supramolecular Synthon - Three Prototypical Structures

“…Als Hauptursache dieser unerwünschten "Synthonüber- Carboxylate protonierter heterocyclischer N-Basen [6][7][8][9][10][11] Guanidinium-nitrat [12], Aminoguanidinium-nitrat [13] Bis(methylguanidinium)-monohydrogenorthophosphat [ 14] Guanidinium-organylsulfonate [15][16][17][18] 1,3-Dimethyluronium-di(benzolsulfonyl)amid [ 19] [Di(methylharnstoff)trimethylzinn(IV)]-dimesylamid [20] N,N'-Di(4-tolyl)formamidinium-tetrafluoroborat [21] Bis(guanidinium)-hexafluorosilicat [22] Ammonioguanidinium-hexafluorosilicat [23] N.N'-Diphenylformamidinium-dimethyldichlorogallat [24] Bis(2-aminopyridinium)-tetrachlorocuprat(II) [25] Bis(2-aminopyridinium)-tetrabromocuprat(II) [26] 1,1-Dimethyluronium-dimesylamid [27] Triflate von Aquametall-Komplexkationen [28,29] Metall(II)-bis(dimesylamid)-Tetrahydrate [ a Symmetrieoperatoren: (i) x -1, y, z\ (ii) x -1, -y + 1,5, z + 0,5; (iii) -x + 1.…”

“…Die Auswahl der Onium-Spezies, mit jeweils zwei geometrisch optimal an geordneten NH-Donoren, geschah nach folgenden Gesichtspunkten: Das in 1 vorliegende bicyclische Guanidinium-Ion ist als Bestandteil künstlicher Re zeptoren für Oxoanionen bekannt geworden[6,37,38] und daher unter supramolekularen Gesichts punkten von besonderem Interesse. Amidine wie das zur Synthese von 2 benutzte Diphenylformamidin finden Beachtung als Komplexliganden und in protonierter Form als Gegenionen für Komplexanionen (z.B [21,24,39]…”