Notes. Some N-Substituted Aminodiphenylphosphines.

Sisler, Harry H.; Smith, N. G.

doi:10.1021/jo01061a617

Cited by 61 publications

(39 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A unique reaction involving complicated intermetallic ligand rearrangement occurred in the reaction of 1b with (COD)PtCl 2 , which afforded a zwitterionic dimetallic complex, (κ 2 -Ph 2 PNiPr)Pt(Ph 2 PNiPr) 2 ZrCl 3 (4). [12] Although dynamic behavior was observed, as described later in detail, 1 H and 13 C NMR spectroscopy clearly showed signals assignable to Ph 2 P and tBu or iPr groups. The molecular structures of 1a,b were determined by X-ray diffraction analysis and are shown in Figure 2; representative bond lengths and angles for 1a,b are summarized in Table 1.…”

Section: Introductionmentioning

confidence: 57%

See 1 more Smart Citation

Zirconium(IV) Tris(phosphinoamide) Complexes as a Tripodal‐Type Metalloligand: A Route to Zr–M (M = Cu, Mo, Pt) Heterodimetallic Complexes

2007

View full text Add to dashboard Cite

Treatment of ZrCl 4 with 3 equiv. of Li(PPh 2 NR) (R = tBu, iPr) gives tris(phosphinoamide)zirconium complexes, (PPh 2 NR) 3 -ZrCl [R = tBu (1a), iPr (1b)], in high yield. Crystal structures of 1a,b show that three phosphorus atoms are coordinated to the zirconium center in the solid state, whereas variable temperature NMR studies indicate a reversible coordination/ dissociation process of three phosphorus atoms in the solution state. Reaction of 1a,b with CuCl give rise to the formation of Zr-Cu heterodimetallic complexes, ClCu(Ph 2 PNR) 3 -ZrCl [R = tBu (2a), iPr (2b)]. The molecular structures of 2a,b show that the Cu atom adopts a pseudotetrahedral coordination geometry with tripodal phosphorus moieties and a chlorine atom, whereas the ligand arrangement around the Zr atom is trigonal bipyramidal with the linear Cl-Zr-Cu axis at

show abstract

Section: Introductionmentioning

confidence: 57%

“…1 H, 13 C, and 31 P NMR spectra were recorded with a JEOL Lambda 600 or a Lambda 400 spectrometer at ambient temperature unless otherwise noted. 1 [12] [Mo(CO) 3 (CH 3 CN) 3 ], [22] and (COD)PtCl 2 [23] were synthesized by the method reported in the literature.…”

Section: Methodsmentioning

confidence: 99%

Zirconium(IV) Tris(phosphinoamide) Complexes as a Tripodal‐Type Metalloligand: A Route to Zr–M (M = Cu, Mo, Pt) Heterodimetallic Complexes

2007

View full text Add to dashboard Cite

show abstract

“…Benzyl alcohol (BnOH) was purchased from Sinopharm Chemical Reagent Co., Ltd., dried over CaO and distilled under dry N 2 prior to use. Ph 2 PNHBu t was prepared according to the reported methods [20]. All other chemicals were obtained from commercial vendors and used as received.…”

Section: General Remarksmentioning

confidence: 99%

Synthesis of lithium and aluminum complexes supported by [OC(But)CHP(Ph2)=NBut]− ligand and catalysis of [R2Al{OC(But)-CHP(Ph2)=NBut}] (R = Me, Et) and [Me2Al{1-{OC(Ph)CH}-3-R1-5-MeC3HN2}] (R1 = Me, But) in the ring-opening polymerization of ɛ-caprolactone

2010

View full text Add to dashboard Cite

A series of lithium and aluminum complexes bearing [OC(Bu t )CHP(Ph 2 )=NBu t ] -ligand were synthesized and characterized. Reaction of Bu t C(O)CH 2 Br with Ph 2 PNHBu t afforded [Ph 2 P(NHBu t )CH 2 C(O)Bu t ] + Br -(1). Treatment of 1 with excess of NaH in THF generated ligand precursor Ph 2 P(CH 2 C(O)Bu t )=NBu t (2). Reaction of 2 with AlR 3 (R = Me, Et) gave N,O-chelate aluminum complexes [R 2 Al{OC(Bu t )CHP(Ph 2 )=NBu t }] (3, R = Me; 4, R = Et). Lithiation of 2 with an equiv. of LiBu n formed lithium complex [Li{OC(Bu t )CHP(Ph 2 )=NBu t }] (5). Reaction of the lithium complex with an equiv. of AlCl 3 yielded [Cl 2 Al{OC(Bu t ) CHP(Ph 2 )=NBu t }] (6). Complex 6 was also obtained by reaction of 3 with an equiv. of AlCl 3 . Compounds 2-6 were characterized by NMR spectroscopy, elemental analysis and single crystal X-ray diffraction techniques (for 2, 3 and 6). Catalysis of complexes 3 and 4 as well as [Me 2 Al{1-{OC(Ph)CH}-3-R 1 -5-MeC 3 HN 2 }] (R 1 = Me, Bu t ) toward the ring-opening polymerization of ε-caprolactone was investigated. N,O-chelate ligands, complex, lithium, aluminum, synthesis, catalysis Citation: Yang D, Cai C F, Wang Z X. Synthesis of lithium and aluminum complexes supported by [OC(Bu t )CHP(Ph 2 )=NBu t ] -ligand and catalysis of [R 2 Al{OC(Bu t ) CHP(Ph 2 )=NBu t }] (R = Me, Et) and [Me 2 Al{1-{OC(Ph)CH} -3-R 1 -5-MeC 3 HN 2 }] (R 1 = Me, Bu t ) in the ring-opening polymerization of ε-caprolactone. Synthetic aliphatic polyesters such as poly(ε-caprolactone) (PCL) and polylactide (PLA) are important materials in biomedical and pharmaceutical applications due to their biodegradable, biocompatible and permeable properties [1-5]. These polymers are usually synthesized by the ring-opening polymerization (ROP) of cyclic esters such as lactones and lactides initiated by metal complexes. The metal-initiated-ROP can enable control of polymer molecular weight and polymer architecture and can yield macromolecular samples with narrow molecular weight distributions [3-8]. Among the catalysts/initiators studied, aluminum complexes have attracted much attention due to their *Corresponding author (email: zxwang@ustc.edu.cn) high activity and selectivity as well as low toxicity of aluminum [9-13]. On the other hand, properties of complexes strongly rely on supporting ligands besides the metal itself. The ligands can tune the properties of the metal center and minimize the aggregation processes and side reactions during the process of polymerization. N,O-Chelate ligands are one of the most often used ligands in aluminum-based catalytic systems. A series of N,O-chelate aluminum complexes such as ketiminate, salicylaldimine, SALAN and SALEN aluminum complexes exhibited excellent catalytic behavior in the ring-opening polymerization of cyclic esters [14-19]. Herein we report synthesis and characterization of lithium and aluminum complexes bearing [OC(Bu t )CHP(Ph 2 )= NBu t ] -ligand and catalysis of [R 2 Al{OC(Bu t )CHP(Ph 2 )=

show abstract

“…For related aminophosphines, values of 840±740 cm ±1 were given for m(P±N) [20] (assumption: P±N single bond), and for 1,2-(PPh 2 NH) 2 C 6 H 4 two strong P±N bands are observed at 904 and 738 cm ±1 [21]. free ligand, m(N±H): 3295 cm ±1 ).…”

Section: Synthesis and Spectroscopic Properties Of [Ni(pph 2 Nhph) 4 mentioning

confidence: 99%

Facile Synthesis and Molecular Structure of [Ni(PPh2NHPh)4]

Kühl

Junk

Hey‐Hawkins

2000

Z. anorg. allg. Chem.

View full text Add to dashboard Cite

NiCl 2´6 H 2 O readily reacts with PPh 2 NHPh in the presence of zinc dust to yield the homoleptic nickel(0) tetrakis-phosphine complex [Ni(PPh 2 NHPh) 4 ] (1). 1 crystallises triclinic P1 (no. 2), with a = 14.656(1), b = 17.124(2), c = 17.424(1) A Ê , a = 95.998(1), b = 111.845(1), c = 111.402(1)°, V = 3630.04(5) A Ê 3 , Z = 2, R values [I > 2r(I)]: R1 = 0.0554, all data: wR2 = 0.1720. The nickel atom is coordinated in a distorted tetrahedral fashion by four phosphorus atoms, resembling a compressed tetrahedron along one of the noncrystallographic S 4 axes.

show abstract

Notes. Some N-Substituted Aminodiphenylphosphines.

Cited by 61 publications

References 0 publications

Zirconium(IV) Tris(phosphinoamide) Complexes as a Tripodal‐Type Metalloligand: A Route to Zr–M (M = Cu, Mo, Pt) Heterodimetallic Complexes

Zirconium(IV) Tris(phosphinoamide) Complexes as a Tripodal‐Type Metalloligand: A Route to Zr–M (M = Cu, Mo, Pt) Heterodimetallic Complexes

Synthesis of lithium and aluminum complexes supported by [OC(But)CHP(Ph2)=NBut]− ligand and catalysis of [R2Al{OC(But)-CHP(Ph2)=NBut}] (R = Me, Et) and [Me2Al{1-{OC(Ph)CH}-3-R1-5-MeC3HN2}] (R1 = Me, But) in the ring-opening polymerization of ɛ-caprolactone

Facile Synthesis and Molecular Structure of [Ni(PPh2NHPh)4]

Contact Info

Product

Resources

About