The Crystal and Molecular Structure of Dichloro(1,10-phenanthroline)zinc

Reimann, Curt W.; Block, S.; Perloff, A.

doi:10.1021/ic50041a024

Cited by 60 publications

(28 citation statements)

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“…The phen ligand is non-planar but the three individual rings are planar. The nonplanarity of the phen ligand is also reported in many other phen complexes (22,25,27,28), and even the phenanthrene molecule was found (23) non-planar in the crystal phase. In Table 7 we present the distances of various atoms from the mean plane of the phen ligand.…”

Section: (B)supporting

confidence: 57%

The Crystal Structure of cis-Chlorobis(triethylphosphine)-1,10-phenanthrolineplatinum(II) fluoroborate, (PtCl(PEt₃)₂(phen))BF₄, a Complex Containing Monodentate 1,10-Phenanthroline

Bushnell¹,

Dixon²,

Khan³

1974

Can. J. Chem.

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/netlt oJ'Cl~e/l~ist,y, Urlil~er.sity of Vic.!oricr, Victo/.icr, Britisl~ Col1r/i7l>io Received October 22, 1973 The crystal structure of cis-chlorobis(triethylphosphine)-l,lO-phenanthrolineplatinum(II) fluoroborate has been determined and refined to an R-value of 0.051. The space group is P2,Ic and the cell dimensions are a = 0.9215(2), b = 1.1991(3), c = 2.6832(6) nm, p = 99.38(3)", with4 molecules per unit cell. The interatomicdistances to Pt are: Pt-N(I), 213.7(19); Pt-N(2), 284.3(20); Pt-P(I), 223.9(7); Pt-P(2), 224.1(6); Pt-CI, 236.1(6) pm.The coordination number and geometry is discussed in terms of 5-coordinate tetragonal pyramidal and 4-coordinate square planar models, the latter being regarded as the more acceptable.Monodentate o-phenanthroline is thus observed for the first time in the solid state. The structure of the complex in solution is discussed with the aid of conductance and nuclear magnetic resonance results which suggest the possibility of a novel fluxional system. Can.

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Section: (B)supporting

confidence: 57%

The Crystal Structure of cis-Chlorobis(triethylphosphine)-1,10-phenanthrolineplatinum(II) fluoroborate, (PtCl(PEt₃)₂(phen))BF₄, a Complex Containing Monodentate 1,10-Phenanthroline

Bushnell¹,

Dixon²,

Khan³

1974

Can. J. Chem.

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“…To evaluate the influence of the guanidine-pyridine hybrid ligands on the structure, complexes C1-C4 were compared with the already reported bipyridine compounds [Zn-A C H T U N G T R E N N U N G (bipy)Cl 2 ] (bipy = 2,2'-bipyridine) [27] and [ZnA C H T U N G T R E N N U N G (phen)Cl 2 ] (phen = 1,10-phenanthroline) [28] as well as the bis-guanidine Complexes with zinc acetate: The molecular structures of…”

Section: Resultsmentioning

confidence: 99%

Lactide Polymerisation with Air‐Stable and Highly Active Zinc Complexes with Guanidine–Pyridine Hybrid Ligands

Börner

Flörke

Huber

et al. 2009

Chemistry A European J

151

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The synthesis of zinc complexes of guanidine-pyridine hybrid ligands [Zn(DMEGpy)Cl(2)] (C1), [Zn(TMGpy)Cl(2)] (C2), [Zn(DMEGqu)Cl(2)] (C3), [Zn(TMGqu)Cl(2)] (C4), [Zn(DMEGpy)(CH(3)COO)(2)] (C5), [Zn(TMGpy)(CH(3)COO)(2)] (C6), [Zn(DMEGqu)(CH(3)COO)(2)] (C7), [Zn(TMGqu)(CH(3)COO)(2)] (C8), [Zn(DMEGqu)(2)(CF(3)SO(3))][CF(3)SO(3)] (C9) and [Zn(TMGqu)(2)(CF(3)SO(3))][CF(3)SO(3)] (C10) is reported. These zinc complexes were completely characterised and screened regarding their activity in the ring-opening polymerisation of D,L-lactide. They proved to be active initiators in lactide bulk polymerisation, and polylactides with molecular weights (M(w)) up to 176,000 g mol(-1) could be obtained. They combine high activity with robustness towards moisture and air. The influence of reaction temperature and of the anionic component of the zinc salt on the activity of the catalyst, as well as the occurrence of undesired side reactions, was investigated. By correlating these findings with the structural study on the zinc complexes we could deduce a structure-reactivity relationship for the zinc catalysts. This study was accompanied by DFT calculations. The bis-chelate triflate complexes C9 and C10, supported by quinoline-guanidine ligands L3 and L4, exhibit by far the highest reactivity. Systematic comparison of these complexes with their mono-chelate counterparts and their bis-guanidine analogues allows the attributes that promote polymerisation by neutral guanidine ligand systems to be elucidated: accessibility to the zinc centre and Lewis acidity.

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“…Des valeurs angulaires aussi faibles sont toujours rencontr6es dans les complexes de ph6nantroline-l,10 et de bipyridyl-2,2' (Reimann, Block & Perloff, 1966;Reimann, Zocchi, Mighell & Santoro, 1970;Stephens, 1969). Les deux sommets axiaux de l'octa6dre sont occup6s par les atomes d'oxyg6ne 0(2) des ions SO ]-.…”

Section: D~termination Et Affinement De La Structureunclassified

Structure du sulfate de diaquo bipyridyl-2,2' nickel, Ni(C10H8N2)(H2O)2SO4

Tedenac¹,

Philippot²

1974

Acta Crystallogr Sect B

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The Crystal and Molecular Structure of Dichloro(1,10-phenanthroline)zinc

Cited by 60 publications

References 0 publications

The Crystal Structure of cis-Chlorobis(triethylphosphine)-1,10-phenanthrolineplatinum(II) fluoroborate, (PtCl(PEt₃)₂(phen))BF₄, a Complex Containing Monodentate 1,10-Phenanthroline

The Crystal Structure of cis-Chlorobis(triethylphosphine)-1,10-phenanthrolineplatinum(II) fluoroborate, (PtCl(PEt₃)₂(phen))BF₄, a Complex Containing Monodentate 1,10-Phenanthroline

Lactide Polymerisation with Air‐Stable and Highly Active Zinc Complexes with Guanidine–Pyridine Hybrid Ligands

Structure du sulfate de diaquo bipyridyl-2,2' nickel, Ni(C10H8N2)(H2O)2SO4

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The Crystal and Molecular Structure of Dichloro(1,10-phenanthroline)zinc

Cited by 60 publications

References 0 publications

The Crystal Structure of cis-Chlorobis(triethylphosphine)-1,10-phenanthrolineplatinum(II) fluoroborate, (PtCl(PEt3)2(phen))BF4, a Complex Containing Monodentate 1,10-Phenanthroline

The Crystal Structure of cis-Chlorobis(triethylphosphine)-1,10-phenanthrolineplatinum(II) fluoroborate, (PtCl(PEt3)2(phen))BF4, a Complex Containing Monodentate 1,10-Phenanthroline

Lactide Polymerisation with Air‐Stable and Highly Active Zinc Complexes with Guanidine–Pyridine Hybrid Ligands

Structure du sulfate de diaquo bipyridyl-2,2' nickel, Ni(C10H8N2)(H2O)2SO4

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The Crystal Structure of cis-Chlorobis(triethylphosphine)-1,10-phenanthrolineplatinum(II) fluoroborate, (PtCl(PEt₃)₂(phen))BF₄, a Complex Containing Monodentate 1,10-Phenanthroline

The Crystal Structure of cis-Chlorobis(triethylphosphine)-1,10-phenanthrolineplatinum(II) fluoroborate, (PtCl(PEt₃)₂(phen))BF₄, a Complex Containing Monodentate 1,10-Phenanthroline