Tin(IV) Polymers: Part 2. Synthesis and Structure of Tri(p-substituted Benzyl)tin(IV) Pyridinecarboxylates and Crystal Structure of [(4-FC6H4CH2)3SnOCO(4-C5H4N)]∞ and [(4-NCC6H4CH2)3SnOCO(4-C5H4N)·2CH3CN]∞

Coordination-Driven Self-Assembly of Macrocycles and 1D or 2D Coordination Polymers Using Heteroditopic Pyridyl-Carboxylate Ligands: The Case Study of 5-[(E)-2-(3-Pyridyl)-1-Diazenyl]-2-Hydroxybenzoate in Combination with {RnSn} (n = 2 and 3)

“…The Sn···O2 contacts are significantly shorter than the sum of the van der Waals radii of the atoms involved (3.78 Å). The Sn–N py bond distances of 2.569(3) Å ( 1 ), 2.553(2) Å ( 2 ), and 2.582(3)/2.572(3) Å ( 3 ) are as expected when compared to other five-coordinate pyridine triorganotin carboxylate adducts. ,,− The values for the O OCO –Sn–C bond angles are on average significantly larger than the N py –Sn–C bond angles (Table ). This umbrella effect is attributed to the stronger binding with the carboxylate group (covalent O–Sn versus covalent coordinate N→Sn bond).…”

Low temperature redetermination of the crystal structure of catena-poly[[tri-4-fluorobenzyltin(IV)]μ2-pyridine-4-carboxylato-κ2 N:O], {C27H22F3NO2Sn}n

“…Finally, a comparison of the new data with previously described room temperature determination of the R = 4fluorobenzyl [19] interaction with reducing temperature is entirely consistent with this contact being primarily a secondary bonding interaction [6,7].…”

“…The common feature of these structures is the presence of five-coordinate tin-atom geometries defined by trans-C 3 NO donor sets owing to the presence of µ 2 -pyridine-4carboxylato bridges. Thus, derivatives with R = methyl [12,13], n-butyl [14], cyclohexyl [15], benzyl [16], 2-chlorobenzyl [17], 2-fluorobenzyl [18], 4-fluorobenzyl [19], phenyl [20] and the mixed species R 3 = phenyl 2 (ethyl) [21] are known. The title compound, i.e.…”

“…the species with R = 4-fluorobenzyl, (I), was isolated as part of continuing interest in this area [9,16]; over and above structural considerations, recent work has indicated both nicotinic and isonicotinic acid derivatives of organotins [12], including benzyltin compounds, display potential as anti-cancer agents [22]. During characterisation of the previosuly described R = 4-fluorobenzyl derivative [19] by X-ray crystallography at 100(2) K, significant differences in some tin-bound parameters were noted between the new data and the literature analysis, conducted at 298(2) K [19]. Hence, herein the crystal and molecular structures of the R = 4-fluorobenzyl compound, redetermined at 100(2) K. are described and compared with literature structures and more specifically with the room temperature structure [19].…”

“…During characterisation of the previosuly described R = 4-fluorobenzyl derivative [19] by X-ray crystallography at 100(2) K, significant differences in some tin-bound parameters were noted between the new data and the literature analysis, conducted at 298(2) K [19]. Hence, herein the crystal and molecular structures of the R = 4-fluorobenzyl compound, redetermined at 100(2) K. are described and compared with literature structures and more specifically with the room temperature structure [19]. A portion of the polymeric structure of (I) is shown in the figure with the crystallographic asymmetric unit, corresponding to a repeat unit, labelled (70% displacement ellipsoids; symmetry operations i: 1/2 − x, 1/2 + y, 1/2 − z and ii: 1/2 − x, −1/2 + y, 1/2 − z).…”