Syntheses and solid-state structures of [{K(THF)2(PHTipp)K(THF)(µ-THF)(PHTipp)}x]2 and [Rb(THF)(PHTipp)]x (Tipp = 2,4,6-Pri3C6H2)

An organometallic tetranuclear cluster with phosphine and phosphido ligands in nonclassical bonding modes: X-ray structural characterization

“…The classical coordination mode for phosphido groups (PR 2 ) is as bridging ligand between two metal centres through the phosphorous atom [41]. Nevertheless, significant examples of l 3 -PR 2 metal transition complexes with like-fivecoordinated P atoms have been reported [30,[42][43][44][45][46][47][48][49][50][51]. In all our complexes in which a PPh 2 group acts as bridging ligand between three platinum or palladium centres, one g 2 -arene coordination of one of the phenyl groups of the phosphido is also observed [1,2,7,52], as in complex 2 (Scheme 1).…”

Synthesis, Structure, and Stability of Lithium Arylphosphanidyl‐diarylphosphane Oxide

“…2,4,6-Triisopropylphenylphosphane (1) [44] and its lithium [45] and potassium salts have been prepared via modified procedures described earlier. [26] The yields given are not optimized. Purity of the compounds was verified by NMR spectroscopy.…”

“…[26] However, the rubidium congener [(thf)Rb-P(H)-Tipp] ϱ shows a comparable wavy ladder structure. [26] In contrast to this aggregation behavior, the smaller mesityl substituents lead to a three-dimensional polymeric structure [27] whereas three-dentate pmdeta bases are able to stabilize dinuclear structures of the type [(pmdeta]K-P(H)-Mes] 2 . [28] Larger terphenyl groups lead to lower aggregation degrees [29] and the crown ether is even able to form mononuclear [(18-C-6) K-P(H)-Mes*].…”

Bis(μ-2,2′-4,4′-6,6′-hexamethyl-μ-terphenyl-2′-phosphanido)bis[(N-methylimidazole)rubidium(I)]

“…Until now the number of structurally authenticated molecular phosphanide compounds of the heavier alkali metals rubidium and caesium is still relatively small (Frenzel et al, 2001;Izod, 2000;Izod et al, 2001;Rabe, Heise et al, 1998;Rabe, Kheradmandan et al, 1998;Rabe et al, 1999Rabe et al, , 2000Smith, 1998). The previously reported tetrameric rubidium phosphanide compound [DmpP(H)Rb] 4 (Rabe, Kheradmandan et al, 1998;Smith, 1998) is not complexed by classical Lewis bases such as tetrahydrofuran, but achieves coordinative saturation instead through %-arene interactions exclusively.…”