Molecular geometry of M(NO)2 complexes: single crystal X-ray structure of Co(NO)2(C5H5N)2+BF4−, lability of the pyridine ligands of Co(NO)2(C5H5N)2+, and its relevance to the formation of the Co2(NO)3+ bimetallic core

The BPh 4 − and BF 4 − derivatives of Co(NO) 2 (Py) 2 + 3 (Py = pyridine) have been prepared. In solution, whereas Co(NO) 2 (L) 2 + BPh 4 − (L = phosphane) and 3 -BF 4 − are inert, 3 -BPh 4 − decomposes rapidly in the absence of an excess of Py. Complex 3 -BF 4 − crystallizes in the monoclinic syste...

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Published in:Canadian journal of chemistry 1992-06, Vol.70 (6), p.1650-1657
Main Authors: Roustan, Jean-Louis, Ansari, Nasrin, Page, Yvon Le, Charland, Jean-Pierre
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container_title Canadian journal of chemistry
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creator Roustan, Jean-Louis
Ansari, Nasrin
Page, Yvon Le
Charland, Jean-Pierre
description The BPh 4 − and BF 4 − derivatives of Co(NO) 2 (Py) 2 + 3 (Py = pyridine) have been prepared. In solution, whereas Co(NO) 2 (L) 2 + BPh 4 − (L = phosphane) and 3 -BF 4 − are inert, 3 -BPh 4 − decomposes rapidly in the absence of an excess of Py. Complex 3 -BF 4 − crystallizes in the monoclinic system with two independent molecules, A and B, in the asymmetric unit, space group P2 1 /a, a = 14.7633(6) Å, b = 13.9739(5) Å, c = 15.1667(6) Å, β = 109.334(4)°, 2225 reflections, R = 0.054, Rw = 0.023. The cobalt coordination polyhedron is a distorted tetrahedron. The comparison of the (O)NCoN(O) angles of 115.6(3)° (molecule A) and 115.9(3)° (molecule B) with those of other pseudotetrahedral dinitrosyl complexes suggests that the lability of the Py ligands of cation 3 reflects the compression experienced by the Co(NO) 2 + molecular portion.
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In solution, whereas Co(NO) 2 (L) 2 + BPh 4 − (L = phosphane) and 3 -BF 4 − are inert, 3 -BPh 4 − decomposes rapidly in the absence of an excess of Py. Complex 3 -BF 4 − crystallizes in the monoclinic system with two independent molecules, A and B, in the asymmetric unit, space group P2 1 /a, a = 14.7633(6) Å, b = 13.9739(5) Å, c = 15.1667(6) Å, β = 109.334(4)°, 2225 reflections, R = 0.054, Rw = 0.023. The cobalt coordination polyhedron is a distorted tetrahedron. The comparison of the (O)NCoN(O) angles of 115.6(3)° (molecule A) and 115.9(3)° (molecule B) with those of other pseudotetrahedral dinitrosyl complexes suggests that the lability of the Py ligands of cation 3 reflects the compression experienced by the Co(NO) 2 + molecular portion.</abstract><cop>Ottawa, Canada</cop><pub>NRC Research Press</pub><doi>10.1139/v92-206</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record>
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title Molecular geometry of M(NO)2 complexes: single crystal X-ray structure of Co(NO)2(C5H5N)2+BF4−, lability of the pyridine ligands of Co(NO)2(C5H5N)2+, and its relevance to the formation of the Co2(NO)3+ bimetallic core
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