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Silver coordination complexes of 2-(diphenylphosphinomethyl)aminopyridine with weakly interacting counterions.

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Title: Silver coordination complexes of 2-(diphenylphosphinomethyl)aminopyridine with weakly interacting counterions.
Authors: Penney, Marissa K.1, Potter, Chelsea1, Burroughs, Mark A.1, Klausmeyer, Kevin K.1 Kevin_Klausmeyer@baylor.edu
Source: Polyhedron. Dec2015, Vol. 102, p207-215. 9p.
Subjects: Silver compounds, Ligands (Chemistry), Metal complexes, Aminopyridines, Condensation reactions, Silver salts
Abstract: A tri-functional ligand (Ph 2 PCH 2 )NH(2-C 5 H 4 N), DPAP-2, has been synthesized via the Mannich condensation reaction and its coordination behavior has been studied with various Ag(I) salts. The ligand is capable of P -coordination, P , N -chelation, and P , N -bridging to form Ag(I) complexes that range from discrete to 1-dimensional polymeric structures. In the 1:2 reaction of AgBF 4 with DPAP-2, a 4-coordinate Ag(I) structure with P , N ′-chelation is isolated ( 1 ). A counterion effect is observed in the equimolar reactions of AgX ( 2 : X = BF 4 − and 3 : X = tfa − ) with DPAP-2, where the structures isolated are a dimer and a 1-dimensional polymer, respectively. When an equivalent of 5,5′-dimethyl-2,2′-dipyridyl (5,5′-dmbpy) was incorporated to the equimolar reaction of AgX and DPAP-2, three isostructural complexes resulted ( 4 : X = BF 4 − , and supplementary structures S1 : X = tfa − , and S2 : X = OTf − ). In the 2:1:2 reaction of AgX ( 5 : X = BF 4 − and 6 : X = tfa − ) with DPAP-2 and 5,5′-dmbpy, two distinct complexes are isolated where DPAP-2 adopts a syn - and anti -arrangement, respectively. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:A tri-functional ligand (Ph 2 PCH 2 )NH(2-C 5 H 4 N), DPAP-2, has been synthesized via the Mannich condensation reaction and its coordination behavior has been studied with various Ag(I) salts. The ligand is capable of P -coordination, P , N -chelation, and P , N -bridging to form Ag(I) complexes that range from discrete to 1-dimensional polymeric structures. In the 1:2 reaction of AgBF 4 with DPAP-2, a 4-coordinate Ag(I) structure with P , N ′-chelation is isolated ( 1 ). A counterion effect is observed in the equimolar reactions of AgX ( 2 : X = BF 4 − and 3 : X = tfa − ) with DPAP-2, where the structures isolated are a dimer and a 1-dimensional polymer, respectively. When an equivalent of 5,5′-dimethyl-2,2′-dipyridyl (5,5′-dmbpy) was incorporated to the equimolar reaction of AgX and DPAP-2, three isostructural complexes resulted ( 4 : X = BF 4 − , and supplementary structures S1 : X = tfa − , and S2 : X = OTf − ). In the 2:1:2 reaction of AgX ( 5 : X = BF 4 − and 6 : X = tfa − ) with DPAP-2 and 5,5′-dmbpy, two distinct complexes are isolated where DPAP-2 adopts a syn - and anti -arrangement, respectively. [ABSTRACT FROM AUTHOR]
ISSN:02775387
DOI:10.1016/j.poly.2015.09.048