A tris(dialkylamino)phosphine with pyramidal nitrogens

White, Douglas W.; Karcher, Barbara Ann; Jacobson, R. A.; Verkade, John G.

doi:10.1021/ja00511a022

Cited by 39 publications

(26 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Acetone (Me 2 CO) was stirred over B 2 O 3 for at least 24 h, distilled, and finally degassed by purging with Argon. [60] Literature known procedures were employed to synthesize the macrocyclic amine side-arm, 1,4-diisopropyl-1,4,7-triazacyclononane, [61,62] and the bridging unit, 3,5-bis(chlorocarbonyl)-1H-pyrazole, [63] used to prepare HL Am .…”

Section: General Materials and Methodsmentioning

confidence: 99%

Improved Synthesis and Detailed Characterization of a Hybrid Pyrazole‐TACN Dinucleating Ligand

Dalle

Dechert

Meyer

2015

Zeitschrift anorg allge chemie

View full text Add to dashboard Cite

Abstract. An improved synthetic procedure is reported for the hybrid ligand HL, composed of two TACN macrocycles bridged by a central pyrazole moiety. Detailed NMR spectroscopic characterization showed that asymmetry in this dinucleating organic scaffold can be induced at room temperature through the use of anhydrous conditions, owing to pyrazole-NH prototropy. Thermally induced line broadening allowed for an estimation of the thermodynamic parameters for this proton exchange reaction, giving ΔH ‡ = 46.

show abstract

Section: General Materials and Methodsmentioning

confidence: 99%

Improved Synthesis and Detailed Characterization of a Hybrid Pyrazole‐TACN Dinucleating Ligand

Dalle

Dechert

Meyer

2015

Zeitschrift anorg allge chemie

View full text Add to dashboard Cite

show abstract

“…while the coordination of the N sites was never observed.8 A forced pyramidal configuration at nitrogen does not guarantee obtaining a stable adduct at nitrogen. 21 The behavior of the bicyclic aminophosphanes 1 (Scheme 11) is therefore of interest. Although the P-adduct 10 is still the first to form, dicoordination to yield 11 readily takes place when a second equivalent of BH, is added (unless there is, as in Id, steric hindrance at nitr~gen).…”

Section: Protonation and Alkylationmentioning

confidence: 99%

About the Coordination Chemistry of the Phosphorus-Nitrogen Entity

Riess

1986

Phosphorous and Sulfur and the Related Elements

View full text Add to dashboard Cite

Triply coordinated trivalent nitrogen atoms are known to lose most or all of their Lewis donor capacity when bonded to a third or higher row element. It is shown here, in the case of P-bonded nitrogen atoms, that structural constraints which maintain the nitrogen atom in a pyramidal configuration can contribute much in preserving their basicity and/or nucleophilic character. In particular, nitrogen atoms apically bonded to 5-coordinated formally penta-or trivalent phosphorus atoms can display definite basicity. Examples of metal-and base-induced opening and closing of P-N bonds are also presented. The following unusual coordination modes and/or reaction issues are exemplified:where A can be-depending on the case-H+,CH~,BH,,BF, or a transition metal moiety, as for example CpMo(CO),CI or CpMo(CO),, etc. The factors that affect the rather variable P-N bond length are discussed.

show abstract

“…This tridentate ligand, connected to a Cu II central atom, promotes mainly fivecoordination (Han et al, 2004;Wang et al, 2004), thus leaving two coordination sites free for the polymerization process during crystallization. As a result of our synthetic procedure using tacnÁ3HBr, prepared according to the literature (White et al, 1979), we have isolated the title compound, (I).…”

Section: Commentmentioning

confidence: 99%

Two different one-dimensional structural motifs in [catena-{Cu(tacn)}₂Pd(CN)₄]Br₂·[catena-Cu(tacn)Pd(CN)₄]₂·H₂O (tacn is 1,4,7-triazacyclononane)

Kuchár

Černák

2009

Acta Crystallogr C

View full text Add to dashboard Cite

The title compound, catena-poly[[bis[(triazacyclononane-kappa(3)N,N',N'')copper(II)]-di-mu-cyanido-kappa(4)N:C-palladate(II)-di-mu-cyanido-kappa(4)C:N] dibromide bis[[(triazacyclononane-kappa(3)N,N',N'')copper(II)]-mu-cyanido-kappa(2)N:C-[dicyanidopalladate(II)]-mu-cyanido-kappa(2)C:N] monohydrate], {[Cu(2)Pd(CN)(4)(C(6)H(15)N(3))(2)]Br(2).[Cu(2)Pd(2)(CN)(8)(C(6)H(15)N(3))(2)].H(2)O}(n), (I), was isolated from an aqueous solution containing tacn.3HBr (tacn is 1,4,7-triazacyclononane), Cu(2+) and tetracyanidopalladate(2-) anions. The crystal structure of (I) is essentially ionic and built up of 2,2-electroneutral chains, viz. [Cu(tacn)(NC)-Pd(CN)(2)-(CN)-], positively charged 2,4-ribbons exhibiting the composition {[Cu(tacn)(NC)(2)-Pd(CN)(2)-Cu(tacn)](2n+)}(n), bromide anions and one disordered water molecule of crystallization. The O atom of the water molecule occupies two unique crystallographic positions, one on a centre of symmetry, which is half occupied, and the other in a general position with one-quarter occupancy. One of the tacn ligands also exhibits disorder. The formation of two different types of one-dimensional structural motif within the same structure is a unique feature of this compound.

show abstract

A tris(dialkylamino)phosphine with pyramidal nitrogens

Cited by 39 publications

References 6 publications

Improved Synthesis and Detailed Characterization of a Hybrid Pyrazole‐TACN Dinucleating Ligand

Improved Synthesis and Detailed Characterization of a Hybrid Pyrazole‐TACN Dinucleating Ligand

About the Coordination Chemistry of the Phosphorus-Nitrogen Entity

Two different one-dimensional structural motifs in [catena-{Cu(tacn)}₂Pd(CN)₄]Br₂·[catena-Cu(tacn)Pd(CN)₄]₂·H₂O (tacn is 1,4,7-triazacyclononane)

Contact Info

Product

Resources

About

A tris(dialkylamino)phosphine with pyramidal nitrogens

Cited by 39 publications

References 6 publications

Improved Synthesis and Detailed Characterization of a Hybrid Pyrazole‐TACN Dinucleating Ligand

Improved Synthesis and Detailed Characterization of a Hybrid Pyrazole‐TACN Dinucleating Ligand

About the Coordination Chemistry of the Phosphorus-Nitrogen Entity

Two different one-dimensional structural motifs in [catena-{Cu(tacn)}2Pd(CN)4]Br2·[catena-Cu(tacn)Pd(CN)4]2·H2O (tacn is 1,4,7-triazacyclononane)

Contact Info

Product

Resources

About

Two different one-dimensional structural motifs in [catena-{Cu(tacn)}₂Pd(CN)₄]Br₂·[catena-Cu(tacn)Pd(CN)₄]₂·H₂O (tacn is 1,4,7-triazacyclononane)