Methanediide Formation via Hydrogen Elimination in Magnesium versus Aluminium Hydride Complexes of a Sterically Demanding Bis(iminophosphoranyl)methanediide

Synthesis, characterisation and reactivity of group 2 complexes with a thiopyridyl scorpionate ligand

“…[23][24][25] In general, the use of monodentate ligands is extremely challenging for the heavy AEs due to their high steric demands 26 and a lot of effort has been put into using multidentate ligands, which include β-diketiminates, 27 macrocycles, 28 and tripodal scorpionates. 29,30 C-Donor functionalities can also be incorporated into multidentate ligands for the stabilisation of AE organometallics, such as bis( phosphoranyl)-methanide and -methanediide ligands, [31][32][33][34][35][36][37][38][39] and various tripodal systems. 40,41 In 2008 Kitano et al reported the use of the scorpionate ligand tris(2-pyridylthio)methanide ({C(S-C 5 H 4 N) 3 } − ; Tptm) for the stabilisation of the heteroleptic zinc complexes [Zn(Tptm)(X)] (X = Cl, Br) via salt elimination.…”

Chasing Multiple Bonding Interactions between Alkaline‐Earth Metals and Main‐Group Fragments

“…Later, the related magnesium and barium derivatives 4 and 5 were synthesized via twofold protonolysis of [Mg( n Bu) 2 ] and [Ba(CH 2 Ph) 2 ] n , respectively (Figure ). Exchange of the SiMe 3 groups for bulky Dipp moieties additionally allowed for the isolation of congeneric Mg II complex 4 ′, or in case of the heavier Ae metals of monomeric complexes [(thf) x Ae{C(Ph 2 P=NDipp) 2 }] ( 6 : Ae=Ca, x =2; 7 : Ae=Ba, x =3) . Noteworthy, complex 4 ′ could not be obtained from twofold protonolysis of [Mg( n Bu) 2 ] with the proligand.…”