Ligands with cycloalkane backbones II. Chelate ligands from 2-(diphenylphosphinyl) cyclohexanol: Syntheses and transition metal complexes

Aminophosphines derived from N‐phenylpiperazine and N‐ethylpiperazine: Synthesis, oxidation reactions, and molybdenum complexes

“…The υ(PPh) bands are observed in 1440 cm −1 for 9 and 1439 cm −1 for 10, respectively. The infrared spectra of the complexes [Mo(CO) 4 4 ] with C 2v symmetry [6,[25][26][27][28]. The generation of [Mo(CO) 4 L] complexes may be used as a rapid "spot test" for the donor properties of new ligands.…”

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“…Whereas a great number of diphosphine monoxides R 2 P±Y±P(:O)R' 2 with various bridging groups have been described in the literature [8], the chemistry of the corresponding monosulfides and monoselenides mainly involves systems of the type R 2 P(CH 2 ) n P(:X)PR' 2 (X = S or Se, n = 1 [9], a few compounds with X = S, R = R' = Ph, n = 2±4 [10]), containing an alkylene backbone, or the related monooxydised bis(phosphinoamines) R 2 P(NR')P(:X)R@ 2 [11]. A small number of structure determinations of transition metal complexes containing new diphosphine monochalcogenide ligands derived from 1,1'-bis-(diphenylphosphino)ferrocene (X = Se, M = Cu [12]), 2-(diphenylphosphinyl)cyclohexanol (X = S, M = Pd [13]) and a phosphorus analogue of polythiophene (X = S, M = Mo [14]) have been reported. This lack of variety in the ligand backbones of diphosphine monosulfides and monoselenides that are available today is surprising, as the lability of the metal-chalcogen bond may give rise to unusual chemistry [15].…”

P−H-Functionalized Phosphanyl Alcohols: RHPCH2CHMeOH and 2-PHR-1-OH-cyclo-C6H10 (R = Ph, 2,4,6-Me3C6H2, 2,4,6-iPr3C6H2) and Molecular Structures of (CR,CR,PR/CS,CS,PS)-2-PH(2,4,6-iPr3C6H2)-1-OH-cyclo-C6H10 and its Dilithio Salt [Li2(THF)0.5{(CR,CR/CS,CS)-2-P(2,4,6-iPr3C6H2)-1-O-cyclo-C6H10}]4

“…While lithium clusters have been observed in electron-deficient alkyl or aryllithium compounds, [10] polyhedral arrangements of lithium phosphanides have been observed only recently. In 1995, Drieß et al reported the formation of clusters of the di-and trimetallated compounds R 1 R 2 Si(PR 3 Li) 2 (R 1 ϭ tBu, R 2 ϭ Tipp, 4 (6a) (only one of the two independent molecules is shown) R 3 ϭ SiPh 3 ) and EtSi(PR 3 Li) 3 (R 3 ϭ SiiPr 3 ). [11] In the former, two dimeric molecules [R 1 R 2 Si(PR 3 Li) 2 ] 2 are connected through an Li 2 Cl 2 square.…”

“…3 J H-H ϭ 6.1 Hz, 6 H, 2 isomers, CHCH 3 ); OH not observed. Ϫ 13 C{H} NMR (C 6 D 6 ): δ ϭ 154.0 (d, 2 J P-C ϭ 10.4 Hz, 4 C, 2 isomers, o-C of Tipp), 150.6 (d, 4 J P-C ϭ 10.1 Hz, 2 C, 2 isomers, p-C of Tipp), 122.4 (s, 4 C, 2 isomers, m-C of Tipp), 67.9 (d, 2 J P-C ϭ 12.1 Hz, 1 C, 1 isomer, OϪCH), 67.6 (d, 2 J P-C ϭ 12.9 Hz, 1 C, 1 isomer, OϪCH), 35.6 (d, 1 J P-C ϭ 13.7 Hz, 1 C, PϪCH 2 ), 35.6 (d, 1 J P-C ϭ 13.9 Hz, 1 C, PϪCH 2 ), 35.4 (s, 2 C, 2 isomers, p-CHMe 2 4 J P-C ϭ 12.4 Hz, 1 C, 1 isomer, p-C of Ph), 134.8 (d, 4 J P-C ϭ 12.1 Hz, 1 C, 1 isomer, p-C of Ph), 129.6 (d, 2 C, 2 isomers, ipso-C, partially obscured by solvent signal), 129.2 (d, 3 J P-C ϭ 6.2 Hz, 2 C, 1 isomer, m-C of Ph), 129.2 (d, 3 J P-C ϭ 5.4 Hz, 2 C, 1 isomer, m-C of Ph), 73.7 (d, 2 J P-C ϭ 9.1 Hz, 1 C, 1 isomer, OϪCH), 73.1 (d, 2 J P-C ϭ 8.8 Hz, 1 C, 1 isomer, OϪCH), 44.4 (d, 1 J P-C ϭ 12.7 Hz, 1 C, 1 isomer, PϪCH), 43.2 (d, 1 J P-C ϭ 10.3 Hz, 1 C, 1 isomer, PϪCH), 37.1 (d, 3 J P-C ϭ 6.3 Hz, 1 C, 1 isomer, C3 of Cy), 36.9 (d, 3 J P-C ϭ 5.1 Hz, 1 C, 1 isomer, C3 of Cy), 32.0 (d, 2 J P-C ϭ 3.8 Hz, 1 C, 1 isomer, C6 of Cy), 30.7 (d, 2 J P-C ϭ 10.0 Hz, 1 C, 1 isomer, C6 of Cy), 27.1 (d, 3 J P-C ϭ 6.4 Hz, 1 C, 1 isomer, C5 of Cy), 26.6 (d, 3 J P-C ϭ 7.9 Hz, 1 C, 1 isomer, C5 of Cy), 25.6 (1 C, 1 isomer, C4 of Cy), 25.5 (1 C, 1 isomer, C4 of Cy). Hz, 2 C, 2 isomers, ipso-C of Tipp), 122.3 (t, 4 C, 2 isomers, m-C of Tipp), 75.6 (d, 2 J P-C ϭ 10.6 Hz, 1 C, 1 isomer, OϪCH), 75.1 (d, 2 J P-C ϭ 13.9 Hz, 1 C, 1 isomer, OϪCH), 45.7 (d, 1 J P-C ϭ 12.0 Hz, 1 C, 1 isomer, PϪCH), 43.3 (d, 1 J P-C ϭ 12.9 Hz, 1 C, 1 isomer, PϪCH), 37.3 (d, 3 J P-C ϭ 6.2 Hz, 1 C, 1 isomer, C3 of Cy), 36.9 (d, 3 J P-C ϭ 6.6 Hz, 1 C, 1 isomer, C3 of Cy), 35.3 (s, 4 C, 2 isomers, o-CHMe 2 of Tipp), 33.7 (d, 2 J P-C ϭ 14.6 Hz, 1 C, 1 isomer, C6 of Cy), 33.6 (d, 2 J P-C ϭ 14.9 Hz, 1 C, 1 isomer, C6 of Cy), 32.7 (s, 2 C, 2 isomers, p-CHMe 2 of Tipp), 29.3 (d, 3 J P-C ϭ 15.2 Hz, 1 C, 1 isomer, C5 of Cy), 27.5 (d, 4 J P-C ϭ 2.8 Hz, 1 C, 1 isomer, C4 of Cy), 27.0 (d, 3 J P-C ϭ 10.…”

“…[3] In 1997, Thiel et al used the stereoselective ring-opening of cyclohexene oxide by lithium diphenylphosphanide to prepare chiral phosphanyl alcohols. [4] Primary [3,5] and secondary [6,7] phosphanyl alcohols have hitherto been used for the preparation of organic P heterocycles. Their ligation properties are, however, largely unstudied.…”