Structure of 1,4-benzenedicyanamide dianion derivatives

Aquino, Manuel A.S.; Crutchley, Robert J.; Lee, F.L.; Gabe, E. J.; Bensimon, Corinne

doi:10.1107/s0108270193001428

Cited by 17 publications

(14 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The salt crystallises in the triclinic space group P1 ¯, with two molecules of water of crystallisation in the asymmetric unit. The L Ϫ ion is essentially planar, as expected given the nature of the fluorenone unit and the tendency of cyanamide moieties to lie parallel to aromatic rings, 11 with the largest deviation from the plane of the fluorenone moiety being 0.15 Å for the atom O(1). The cyanamide N᎐ ᎐ C᎐ ᎐ N group is pointing slightly below the plane of the rest of the ion so that the terminal nitrogen atom N(2) is 0.25 Å from the plane.…”

Section: Resultssupporting

confidence: 54%

Synthesis, structure and metal compounds of a novel chromophoric cyanamide ligand

Adams¹

1999

J. Chem. Soc., Dalton Trans.

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 54%

Synthesis, structure and metal compounds of a novel chromophoric cyanamide ligand

Adams¹

1999

J. Chem. Soc., Dalton Trans.

View full text Add to dashboard Cite

“…The NCN groups deviate from the ring plane by an angle of 20.6°. This structure is similar to those of the dicyd 2À derivatives because, excepted for the tetramethyl derivative [33], all these com-pounds are approximately planar with an anti conformation [34]. The three C-N distances in the sequence N(nitrile)-C-N(amido)-C(cycle) are 1.152(3), 1.351(3) and 1.325(3) Å , respectively, the first one being similar to the C-N(nitrile) distances observed in 2,4-dcmsq 2À (1.153(4) and 1.149(5) Å ) [6].…”

Section: Crystal Structure Of (Ph 4 P) 2 L Ae 4h 2 O (2)supporting

confidence: 57%

Nickel coordination compounds of the cyanamido squarate ligand. The crystal structures of the 2,4-bis(cyanamido)cyclobutane-1,3-dione dianion (2,4-NCNsq2−) and of three polymers with general formula [Ni(Him)x(H2O)4−x(2,4-NCNsq)·yH2O]n (x=2–4; y=1–3; Him=imidazole)

Cortadellas¹,

Galibert²,

Soula³

et al. 2006

Inorganica Chimica Acta

View full text Add to dashboard Cite

OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in: http://oatao.univ-toulouse.fr/ Eprints ID : 2545To link to this article : URL : http://dx.Nickel coordination compounds of the cyanamido squarate ligand. The crystal structures of the 2,4-bis(cyanamido)cyclobutane-1,3-dione dianion (2,4-NCNsq 2À ) and of three polymers with generalDisodium and ditetraphenylphosphonium salts of 2,4-bis(cyanamido)cyclobutane-1,3-dione, Na 2 (2,4-NCNsq) AE 2H 2 O (1) and (Ph 4 P) 2 (2,4-NCNsq) AE 4H 2 O (2) have been synthesized and used to prepare three nickel(II) complexes: [Ni(Him) 4 (2,4-NCNsq) AE 2H 2 O] n (3), [Ni(Him) 3 (H 2 O)(2,4-NCNsq) AE H 2 O] n (4) and [Ni(Him) 2 (H 2 O) 2 (2,4-NCNsq) AE 3H 2 O] n (5). Compounds 1-5 have been synthesized and characterized by electronic absorption and IR spectroscopies and by electrochemical studies. The structures of the salt 2 and of the complexes 3-5 have been determined by X-ray crystallography. The dianion of 2 presents a centro-symmetric square planar structure with two NCN functions deviated from the ring plane by an angle of 20.6°. Complexes 3-5 are polynuclear nickel(II) compounds containing 2,4-NCNsq 2À bridging ligands. These ligands are coordinated by the nitrile nitrogen atoms of the cyanamido functions and lie in cis (complex 4) or trans (complexes 3 and 5) positions in the coordination sphere of the nickel(II). The magnetic properties of the three complexes have been investigated in the 2-300 K temperature range (l eff = 2.79-3.34 l B for 3, 2.76-3.25 l B for 4 and 3.14-3.46 l B for 5). Their redox properties are discussed and compared to those of the free 2,4-NCNsq 2À dianion.

show abstract

“…[15] The RuϪN (6) The cyanamido groups of the (dcpeb) 2Ϫ ligand adopt a trans disposition, as generally observed in dinuclear bis-cyanamido complexes, [5] and free ligands (dicyd)(AsPh 4 ) 2 [16] and (dcpib)(AsPh 4 ) 2 , [17] where dcpib ϭ 4,4Ј-dicyanamidobiphenyl. The only exception is [{Ru(NH 3 ) 4 (py)} 2 µ-(dicyd)] 4ϩ where the cyanamide groups are cis.…”

Section: Resultsmentioning

confidence: 99%

X-ray Structure of a Ruthenium Dinuclear Complex Incorporating 4,4′-Bis(cyanamidophenylethynyl)benzene as a Ligand, a Conjugated Bridge Two Nanometers in Length

Sondaz¹,

Jaud²,

Launay³

et al. 2002

Eur. J. Inorg. Chem.

View full text Add to dashboard Cite

Keywords: Ruthenium / Bridging ligands / N ligands / X-ray structureThe reaction of [Ru(bpy)(tpy)(Ipcyd)] + (bpy = 2,2Ј-bipyridine, tpy = 2,2Ј:6Ј,2ЈЈ-terpyridine, Ipcyd = 4-iodophenylcyanamide anion) with diethynylbenzene in a Sonogashira cross-coupling reaction gives an unprecedentedly long and conjugated dinuclear complex [{[Ru(bpy)(tpy)] 2 (µ-dcpeb)}(BPh 4 ) 2 ]· 4(PhCH 3 ) (dcpeb = dicyanamidophenylethynylbenzene dianion). The crystal structure data are as follows: crystal sys-

show abstract

Structure of 1,4-benzenedicyanamide dianion derivatives

Cited by 17 publications

References 4 publications

Synthesis, structure and metal compounds of a novel chromophoric cyanamide ligand

Synthesis, structure and metal compounds of a novel chromophoric cyanamide ligand

Nickel coordination compounds of the cyanamido squarate ligand. The crystal structures of the 2,4-bis(cyanamido)cyclobutane-1,3-dione dianion (2,4-NCNsq2−) and of three polymers with general formula [Ni(Him)x(H2O)4−x(2,4-NCNsq)·yH2O]n (x=2–4; y=1–3; Him=imidazole)

X-ray Structure of a Ruthenium Dinuclear Complex Incorporating 4,4′-Bis(cyanamidophenylethynyl)benzene as a Ligand, a Conjugated Bridge Two Nanometers in Length

Contact Info

Product

Resources

About