FORMATION OF AZACROWN COMPLEXES OF TIN(IV) - CRYSTAL AND MOLECULAR-STRUCTURE OF [H2L]2[SNCL5(H2O)]2.H2O.MECN (HL = 1,4,7,10,13-PENTAOXA-16-AZACYCLOOCTADECANE)
UNSPECIFIED (1993) FORMATION OF AZACROWN COMPLEXES OF TIN(IV) - CRYSTAL AND MOLECULAR-STRUCTURE OF [H2L]2[SNCL5(H2O)]2.H2O.MECN (HL = 1,4,7,10,13-PENTAOXA-16-AZACYCLOOCTADECANE). JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS (15). pp. 2359-2363. ISSN 0300-9246Full text not available from this repository.
Reaction of SnCl4 and aza-18-crown-6 (1,4,7,10,13-pentaoxa-16-azacyclooctadecane, HL) provides the white solid SnCl3L 1 with elimination of HCI. Analytical and spectroscopic characterisation of 1 points to a structure in which a SnCl3 unit is bonded to the deprotonated nitrogen atom and the two adjacent oxygen atoms of the azacrown. Partial hydrolysis of 1 during an attempted recrystallisation in acetonitrile, gave colourless crystals of the ionic compound [H2L]2[SnCl5(H2O)]2.H2O.MeCN 2 the structure of which was determined by X-ray diffraction: monoclinic, space group C2/m, a = 40.15(2), b = 12.231 (6), c = 10.019(7) angstrom, beta = 104.05(5)-degrees, Z = 4. Two independent azacrown molecules are both protonated. Molecule 1 has the solvate water molecule located centrally over the ring cavity, held by three strong O-H(water) ... O(ring) 2.793 and O(water) ... H-N(ring) 2.690 angstrom hydrogen bonds; molecule 2 behaves as a second-sphere ligand to two separate six-co-ordinate (SnCl5(H2O)]- anions positioned on opposite sides of the ring. The co-ordinated H2O molecules are located over the centre of the azacrown ligand and are involved in hydrogen bonding to the nitrogen and oxygen atoms of the ring.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry|
|Journal or Publication Title:||JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS|
|Publisher:||ROYAL SOC CHEMISTRY|
|Date:||7 August 1993|
|Number of Pages:||5|
|Page Range:||pp. 2359-2363|
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