Synthesis and structural characterization of a homoleptic cerium(III) propiolamidinate

Formation and structural characterization of a potassium amidinoguanidinate

“…All of these reactions are generally quite straightforward and afford the desired products in high yields. Less investigated are amidinate salts of the heavier alkali metals sodium and potassium Junk & Cole, 2007;Yao et al, 2009;Drö se et al, 2010, Chen et al, 2018.…”

New Lanthanide Alkynylamidinates and Diiminophosphinates

“…While the N,N′-isopropyl-substituted lithium-propiolamidinate salt Li[Ph-C≡C-C(N i Pr)2] THF (1) was already known from previous studies [16,28,34], we prepared the cyclohexyl derivatives 2 and 3 in a straightforward manner according to Scheme 2 by in situ deprotonation of phenylacetylene with n BuLi at −20 °C in THF or Et2O followed by addition of N,N′-dicyclohexylcarbodiimide. After 10 min, the reaction mixtures were warmed to room temperature and stirred for two hours.…”

“…The IR spectrum of 2 shows a medium band at 2217 cm −1 , which could be assigned to the C≡C triple bond, while in the spectrum of 3 it appears as a weak band at 2211 cm as a very strong band in the spectrum of 2 and at 1592 cm −1 as strong band in that of 3 [16]. The NMR spectra were recorded in toluene-d8 and C6D6 for 2 and 3, respectively.…”

“…Pr)2]3Ce [16]. In the course of our ongoing investigation of lanthanide amidinates we recently started a project to study lanthanide alkynylamidinates derived from phenylacetylene and cyclopropylacetylene.…”

Scandium, yttrium, the lanthanides

“…99 Lowtemperature oxidation of Ce III amides [Ce(NR 2 ) 3 ] (NR 2Q N(SiMe 3 ) 2 , TMP) with O 2 gives Ce IV oxo-and peroxo-products including [{Ce(N(SiMe 100 [Ce(PhCC(N i Pr) 2 ) 3 ] is the first homoleptic lanthanide tris(propiolamidinate). 101 The guanidinato-complexes [Ln(Priso) 2 ] (Ln = Sm, Eu, Yb) have metal environments midway between tetrahedral and planar; [Ln(Giso) 2 ], which involve bulkier ligands, have either planar or distorted tetrahedral geometries. 102 103 Monomeric octahedral alkoxides [Sm(OCR 3 ) 3 (thf) 3 ] (R = thiophene-based substituent) have been characterised.…”