Crystal and molecular structure of bis(N-n-decyl-o-hydroxyacetophen-oniminato) copper(II)

Jain, Prem C.; Bindlish, J. M.; Kashyap, R. P.

doi:10.1039/dt9760002129

Cited by 8 publications

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“…The inclination of the p-tolyl group of 124 ° to the remaining part of the asymmetric unit (Table 3) has resulted in some close contacts, namely C(8)... C(7) 2.32, C(8)...C(9) 2.97 and C(8)...Cu 3.30 A, which affect the geometrical conformation of the chelate ring, especially in the neighbourhood of N. The result is that the bond lengths and interbond angles of the chelate ring are slightly different in the present case from the values found in (phenylsim)2Cu (Wei, Stogsdill & Lingafelter, 1964) and in the pyridine solvate of (phenylsim)2Cu (Hall, SheatRumball & Waters, 1968). N-C(8), 1.45 A, is similar to the value observed in other sim-Cu molecules having an aromatic ring substituent on N. A study of N-C(8) lengths in different types of N-substituted sim-Cu molecules shows that molecules having a simple phenyl group or p-tolyl group as substituent (Table 4) have, in general, a length of about 1.45 A whereas those having a linear chain (Jain, Bindlish & Kashyap, 1976), cyclohexyl ring, or ethylenediamine as substituent normally have a value above 1.47 A. Thus N shows greater donation to the multibonding system in the presence of aromaticity around it.…”

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confidence: 57%

Crystallographic studies of bis(N-p-tolylsalicylaldiminato)copper(II)

Bindlish¹,

Bhatia²,

Jain³

1976

Acta Crystallogr Sect B

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presence of aqueous ammonium phosphate solutions. Particularly, struvite is reported to react with a saturated solution of ammonium dihydrogen phosphate to form hannayite, which is then slowly replaced by schertelite; these reactions can be summarized as follows:3 struvite + 3NH4H2PO4 hannayite + 2(NH4)2HPO4 + 10H20 ~-3 schertelite + 6H20.Inversely, schertelite and hannayite undergo hydrolytic reactions dissolving incongruently in water:schertelite + 2H20 struvite + NH4H2PO4, hannayite + 4H20 struvite + 2 newberyite + NH4HzPO 4.Such transformations also probably occur in human renal liquids under pathological conditions. They can be explained by the strong tendency of systems with this chemical composition to give crystals characterized by a layered structure, where the amount of NH + ions between layers and the degree of condensation of coordination polyhedra inside the layers vary according to the concentrations of the different chemical species. When hannayite transforms into schertelite, for instance, the condensation of polyhedra decreases strongly, with the formation of isolated Mg(H20)4(OPO2OH)2 groups. The first bonds which break in hannayite are likely to be Mg(2)-O(3) and Mg(2)-O(7) (Fig. 2), since they involve the most underbonded O atoms in the structure (~si = 1.83 v.u.); this should be true both for complete solubilization of crystals and for incomplete solubilization with partial solid-state reaction. The latter mechanism would agree with the fact that, by breaking Mg(2)-O(3), isolated groups of Mg(H20)4(OPO2OH)2 are formed, which could build up the schertelite crystal framework.The X-ray intensities were measured at the Centro di Studio del C.N.R. per la Cristallografia Strutturale, Pavia.Research was supported by the Consiglio Nazionale delle Ricerche, Roma. The structure of bis-(N-p-tolylsalicylaldiminato)copper(II) has been determined by the photographic method and refined to R= 0.09. The crystals are monoclinic needles, a= 13.584, b= 7.546, e= 12-221 A, fl= 110-8 °, Z=2. The structure consists of discrete molecules in which the metal atom exhibits trans-planar fourfold coordination and has Cu-O 1.899 and Cu-N 2-010 ,~. The p-tolyl group is inclined by 124 ° to the salicylaldimine plane. References

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Section: Discussionsupporting

confidence: 57%

Crystallographic studies of bis(N-p-tolylsalicylaldiminato)copper(II)

Bindlish¹,

Bhatia²,

Jain³

1976

Acta Crystallogr Sect B

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“…These values are in good agreement with those found for the reported tetra-coordinated Cu(II) complexes containing similar Schiff base ligands. [24][25][26] The crystal structure of 3 essentially results from the parallel packing of supramolecular ribbons along a crystallographic axis, as shown in Figure 3. The formation of supramolecular ribbons is realised due to the short intermolecular C-H···O contacts, which can be interpreted as the weak hydrogen bonds.…”

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Mononuclear Cu(II) complexes of novel salicylidene Schiff bases: synthesis and mesogenic properties

et al. 2015

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Two new Schiff base ligands 1 and 2 (where 1 = 4-(2-hydroxybenzilidenamino)-phenyl-4-(decyloxy)-2-(pent-4-enyloxy)benzoate, 2 = 4-(4-(decyloxy)-2-hydroxybenziliden amino)-phenyl-4-(decyloxy)-2-(pent-4-enyloxy)benzoate) and their copper (Cu)(II) complexes have been synthesised and characterised. The derivatives were fully characterised structurally, and their mesomorphic behaviour was investigated by polarised optical microscopyand differential scanning calorimetry. The structure of Cu(II) complex having 1 as ligand (3) was determined by X-ray diffraction. The Schiff base ligands exhibit enantiotropic nematic phases, the Cu(II) complex 4 shows monotropic nematic phase behaviour, while compound 3 does not show mesomorphism.

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ChemInform Abstract: CRYSTAL AND MOLECULAR STRUCTURE OF BIS(N‐N‐DECYL‐O‐HYDROXYACETOPHENONIMINATO)COPPER(II)

Jain¹,

Bindlish²,

Kashyap³

1977

Chemischer Informationsdienst

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Crystal and molecular structure of bis(N-n-decyl-o-hydroxyacetophen-oniminato) copper(II)

Abstract: Crystal and Molecular Structure of Bis(N-n-decyl-o-hydroxyacetophenoniminato)copper(ir) t

Cited by 8 publications

References 0 publications

Crystallographic studies of bis(N-p-tolylsalicylaldiminato)copper(II)

Crystallographic studies of bis(N-p-tolylsalicylaldiminato)copper(II)

Mononuclear Cu(II) complexes of novel salicylidene Schiff bases: synthesis and mesogenic properties

ChemInform Abstract: CRYSTAL AND MOLECULAR STRUCTURE OF BIS(N‐N‐DECYL‐O‐HYDROXYACETOPHENONIMINATO)COPPER(II)

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