UNSPECIFIED. (1993) PREPARATIONS AND STRUCTURAL CORRELATIONS FOR THE COMPLEXES OF M(III) HALIDES (M = AS, SB, BI) WITH CROWN-ETHERS - STRUCTURES OF ASCL3.12-CROWN-4, ASCL3.15-CROWN-5, SBCL3.12-CROWN-4 AND BICL3.15-CROWN-5-ASTERISK AND AN EVALUATION OF RELATIVE BINDING STRENGTHS FOR CROWN LIGANDS. ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 49 (Part 3). pp. 507-514. ISSN 0108-7681

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Abstract

The preparations and structures of four new complexes are reported in the family of MCl3.crown complexes (M = As, Sb, Bi; crown = 12-crown-4, 15-crown-5, 18-crown-6). The structures of the eight isolable members of the family are compared and trends established. The M-O bonding is much weaker than the M-Cl bonding, becoming stronger in the order Bi > Sb > As and 12-crown-4 > 15-crown-5 > 18-crown-6. The Cl-M-Cl angles are reduced compared to those in the free halides, but the M-Cl bonds are only slightly lengthened. The crown torsion angles show characteristic patterns involving gauche C-C bonds and alternating gauche and anti C-O bonds.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry
Journal or Publication Title:	ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE
Publisher:	MUNKSGAARD INT PUBL LTD
ISSN:	0108-7681
Official Date:	1 June 1993
Dates:	Date Event 1 June 1993 UNSPECIFIED
Volume:	49
Number:	Part 3
Number of Pages:	8
Page Range:	pp. 507-514
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/21229

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