@ARTICLE{Gasperini20043376,
author={Gasperini, M. and Ragaini, F. and Gazzola, E. and Caselli, A. and Macchi, P.},
title={Synthesis of mixed Ar,Ar′-BIAN ligands (Ar,Ar′-BIAN = bis(aryl) acenaphthenequinonediimine). Measurement of the coordination strength of hemilabile ligands with respect to their symmetric counterparts},
journal={Dalton Transactions},
year={2004},
number={20},
pages={3376-3382},
doi={10.1039/b406582d},
note={cited By 43},
url={https://www.scopus.com/inward/record.uri?eid=2-s2.0-9244234440&doi=10.1039%2fb406582d&partnerID=40&md5=04995bca47fcb82c997aa73e414078ff},
affiliation={Dipartimento di Chimica Inorganica, INSM-CNR, V. G. Venezian 21, I-20133 Milano, Italy; Dipartimento di Chimica Strutturale, INSM-CNR, V. G. Venezian 21, I-20133 Milano, Italy},
abstract={The synthesis of Ar,Ar′-BIAN ligands (Ar,Ar′-BIAN = bis(aryl)acenaphthenequinonediimine) having different aryl groups bound to the two nitrogen atoms is reported for the first time. The ligands were obtained by two different strategies: (i) by a transimination reaction starting from a symmetric Ar,Ar-BIAN ligand having aryl groups bearing strongly electron-withdrawing substituents or (ii) by a two-step-one-pot sequence. The ligands synthesized have been chosen so that the electronic difference between the two aryl groups is very large, but the steric difference is variable and, in one case, the ligand is almost sterically symmetric. The coordination strength of the new ligands towards three palladium complexes has been measured by a competition experiment following a protocol previously described by us. The coordination strength of the mixed ligands is the mean of those of the corresponding symmetric counterparts. The X-ray crystal structure of a palladium π-allyl complex of the electronically asymmetric-sterically symmetric ligand (3,5-(CF3)2C6H3),(3,5-Me 2C6H3)-BIAN has been solved, together with those of the two symmetric analogues to allow a comparison. Despite the fact that the dodecafluorinated ligand has a Keq value about three orders of magnitude lower than the non-fluorinated counterpart, no notable difference is observed in the N-Pd and Pd-Callyl distances in the three complexes. Calculations at the density functional level confirm that Pd-BIAN distances are not strictly correlated to the coordination energies, which are in qualitative agreement with the spectroscopic evidence. The bond length is thus not a good indication of the bond strength in these cases.},
keywords={Bond strength (chemical);  Catalysis;  Copolymerization;  Hydrogenation;  Synthesis (chemical), Catalytic systems;  Coordination strength;  Selective hydrogenation, Aromatic compounds},
references={Dvolaitzky, M., (1969) C. R. Acad. Sci. Paris, Ser. C, 268, p. 1811; Dvolaitzky, M., (1969) Chem. Abstr., 71, pp. 61566b; Matei, I., Lixandru, T., (1967) Bull Ist. Politeh. Iasi, 13, p. 245; Matei, I., Lixandru, T., (1969) Chem. Abstr., 70, pp. 3623m; Van Asselt, R., Elsevier, C.J., Smeets, W.J.J., Spek, A.L., Benedix, R., (1994) Red. Trav. Chim. Pays-Bas, 113, p. 88; Van Asselt, R., Elsevier, C.J., (1991) J. Mol. Catal., 65, pp. L13; Ittel, S.D., Johnson, L.K., Brookhart, M., (2000) Chem. Rev., 100, p. 1169; Svejda, S.A., Brookhart, M., (1999) Organometallics, 18, p. 65; Tempel, D.J., Johnson, L.K., Huff, R.L., White, P.S., Brookhart, M., (2000) J. Am. Chem. Soc., 122, p. 6686; Llewellyn, D.B., Adamson, D., Amdtsen, B.A., (2000) Org. Lett., 2, p. 4165; Groen, J.H., Delis, J.G.P., Van Leeuwen, P.W.N.M., Vrieze, K., (1997) Organometallics, 16, p. 68; Van Belzen, R., Hoffmann, H., Elsevier, C.J., (1997) Angew. Chem., Int. Ed. Engl., 36, p. 1743; Van Belzen, R., Klein, R.A., Kooijman, H., Veldman, N., Spek, A.L., Elsevier, C.J., (1998) Organometallics, 17, p. 1812; Van Beizen, R., Elsevier, C.J., Dedieu, A., Veldman, N., Spek, A.L., (2003) Organometallics, 22, p. 722; Shirakawa, E., Yoshida, H., Nakao, Y., Hiyama, T., (1999) J. Am. Chem. Soc., 121, p. 4290; Van Laren, M.W., Elsevier, C.J., (1999) Angew. Chem., Int. Ed., 38, p. 3715; Cenini, S., Ragaini, F., Tollari, S., Paone, D., (1996) J. Am. Chem. Soc., 118, p. 11964; Ragaini, F., Cenini, S., Tollari, S., Tummolillo, G., Beltrami, R., (1999) Organometallics, 18, p. 928; Ragaini, F., Cenini, S., Borsani, E., Dompé, M., Gallo, E., Moret, M., (2001) Organometallics, 20, p. 3390; Ragaini, F., Cenini, S., Tollari, S., (1993) J. Mol. Catal., 85, pp. L1; Ragaini, F., Cenini, S., Gasperini, M., (2001) J. Mol. Catal. A, 174, p. 51; Van Asselt, R., Elsevier, C.J., (1992) Organometallics, 11, p. 1999; Van Asselt, R., Elsevier, C.J., (1994) Tetrahedron, 50, p. 323; Van Asselt, R., Elsevier, C.J., (1994) Organometallics, 13, p. 1972; Grasa, G.A., Hillier, A.C., Nolan, S.P., (2001) Org. Lett., 3, p. 1077; Tollari, S., Cenini, S., Ragaini, F., Cassar, L., (1994) J. Chem. Soc., Chem. Commun., p. 1741; Annunziata, R., Cenini, S., Palmisano, G., Tollari, S., (1996) Synth. Commun., 26, p. 495; Ragaini, F., Sportiello, P., Cenini, S., (1999) J. Organomet. Chem., 577, p. 283; Cenini, S., Bettetini, E., Fedele, M., Tollari, S., (1996) J. Mol. Catal., 111, p. 37; Grasa, G.A., Singh, R., Stevenson, E.D., Nolan, S.P., (2003) J. Organomet. Chem., 687, p. 689; Gasperini, M., Ragaini, F., Cenini, S., (2002) Organometallics, 21, p. 2950; Gasperini, M., Ragaini, F., (2004) Organometallics, 23, p. 995; The mixed Ph,(4-MeC6H4)-BIAN has been mentioned in a table in ref. 10, but its synthesis and properties have not been described; Mäkele, M.J., Korpela, T.K., (1983) Chem. Soc. Rev., 12, p. 309. , and references therein; Bader, R.F.W., Stephens, M.E., (1975) J. Am. Chem. Soc., 97, p. 7391; Bader, R.F.W., (1991) Atoms in Molecules. A Quantum Theory, , Cambridge University Press, Oxford, UK},
correspondence_address1={Ragaini, F.; Dipartimento di Chimica Inorganica, V. G. Venezian 21, I-20133 Milano, Italy; email: fabio.ragaini@unimi.it},
issn={14779226},
language={English},
abbrev_source_title={Dalton Trans.},
document_type={Article},
source={Scopus},
}

{"_id":"T5PCX7zJnY5w5P4jA","bibbaseid":"gasperini-ragaini-gazzola-caselli-macchi-synthesisofmixedararbianligandsararbianbisarylacenaphthenequinonediiminemeasurementofthecoordinationstrengthofhemilabileligandswithrespecttotheirsymmetriccounterparts-2004","author_short":["Gasperini, M.","Ragaini, F.","Gazzola, E.","Caselli, A.","Macchi, P."],"bibdata":{"bibtype":"article","type":"article","author":[{"propositions":[],"lastnames":["Gasperini"],"firstnames":["M."],"suffixes":[]},{"propositions":[],"lastnames":["Ragaini"],"firstnames":["F."],"suffixes":[]},{"propositions":[],"lastnames":["Gazzola"],"firstnames":["E."],"suffixes":[]},{"propositions":[],"lastnames":["Caselli"],"firstnames":["A."],"suffixes":[]},{"propositions":[],"lastnames":["Macchi"],"firstnames":["P."],"suffixes":[]}],"title":"Synthesis of mixed Ar,Ar′-BIAN ligands (Ar,Ar′-BIAN = bis(aryl) acenaphthenequinonediimine). Measurement of the coordination strength of hemilabile ligands with respect to their symmetric counterparts","journal":"Dalton Transactions","year":"2004","number":"20","pages":"3376-3382","doi":"10.1039/b406582d","note":"cited By 43","url":"https://www.scopus.com/inward/record.uri?eid=2-s2.0-9244234440&doi=10.1039%2fb406582d&partnerID=40&md5=04995bca47fcb82c997aa73e414078ff","affiliation":"Dipartimento di Chimica Inorganica, INSM-CNR, V. G. Venezian 21, I-20133 Milano, Italy; Dipartimento di Chimica Strutturale, INSM-CNR, V. G. Venezian 21, I-20133 Milano, Italy","abstract":"The synthesis of Ar,Ar′-BIAN ligands (Ar,Ar′-BIAN = bis(aryl)acenaphthenequinonediimine) having different aryl groups bound to the two nitrogen atoms is reported for the first time. The ligands were obtained by two different strategies: (i) by a transimination reaction starting from a symmetric Ar,Ar-BIAN ligand having aryl groups bearing strongly electron-withdrawing substituents or (ii) by a two-step-one-pot sequence. The ligands synthesized have been chosen so that the electronic difference between the two aryl groups is very large, but the steric difference is variable and, in one case, the ligand is almost sterically symmetric. The coordination strength of the new ligands towards three palladium complexes has been measured by a competition experiment following a protocol previously described by us. The coordination strength of the mixed ligands is the mean of those of the corresponding symmetric counterparts. The X-ray crystal structure of a palladium π-allyl complex of the electronically asymmetric-sterically symmetric ligand (3,5-(CF3)2C6H3),(3,5-Me 2C6H3)-BIAN has been solved, together with those of the two symmetric analogues to allow a comparison. Despite the fact that the dodecafluorinated ligand has a Keq value about three orders of magnitude lower than the non-fluorinated counterpart, no notable difference is observed in the N-Pd and Pd-Callyl distances in the three complexes. Calculations at the density functional level confirm that Pd-BIAN distances are not strictly correlated to the coordination energies, which are in qualitative agreement with the spectroscopic evidence. The bond length is thus not a good indication of the bond strength in these cases.","keywords":"Bond strength (chemical); Catalysis; Copolymerization; Hydrogenation; Synthesis (chemical), Catalytic systems; Coordination strength; Selective hydrogenation, Aromatic compounds","references":"Dvolaitzky, M., (1969) C. R. Acad. Sci. Paris, Ser. C, 268, p. 1811; Dvolaitzky, M., (1969) Chem. Abstr., 71, pp. 61566b; Matei, I., Lixandru, T., (1967) Bull Ist. Politeh. Iasi, 13, p. 245; Matei, I., Lixandru, T., (1969) Chem. Abstr., 70, pp. 3623m; Van Asselt, R., Elsevier, C.J., Smeets, W.J.J., Spek, A.L., Benedix, R., (1994) Red. Trav. Chim. Pays-Bas, 113, p. 88; Van Asselt, R., Elsevier, C.J., (1991) J. Mol. Catal., 65, pp. L13; Ittel, S.D., Johnson, L.K., Brookhart, M., (2000) Chem. Rev., 100, p. 1169; Svejda, S.A., Brookhart, M., (1999) Organometallics, 18, p. 65; Tempel, D.J., Johnson, L.K., Huff, R.L., White, P.S., Brookhart, M., (2000) J. Am. Chem. Soc., 122, p. 6686; Llewellyn, D.B., Adamson, D., Amdtsen, B.A., (2000) Org. Lett., 2, p. 4165; Groen, J.H., Delis, J.G.P., Van Leeuwen, P.W.N.M., Vrieze, K., (1997) Organometallics, 16, p. 68; Van Belzen, R., Hoffmann, H., Elsevier, C.J., (1997) Angew. Chem., Int. Ed. Engl., 36, p. 1743; Van Belzen, R., Klein, R.A., Kooijman, H., Veldman, N., Spek, A.L., Elsevier, C.J., (1998) Organometallics, 17, p. 1812; Van Beizen, R., Elsevier, C.J., Dedieu, A., Veldman, N., Spek, A.L., (2003) Organometallics, 22, p. 722; Shirakawa, E., Yoshida, H., Nakao, Y., Hiyama, T., (1999) J. Am. Chem. Soc., 121, p. 4290; Van Laren, M.W., Elsevier, C.J., (1999) Angew. Chem., Int. Ed., 38, p. 3715; Cenini, S., Ragaini, F., Tollari, S., Paone, D., (1996) J. Am. Chem. Soc., 118, p. 11964; Ragaini, F., Cenini, S., Tollari, S., Tummolillo, G., Beltrami, R., (1999) Organometallics, 18, p. 928; Ragaini, F., Cenini, S., Borsani, E., Dompé, M., Gallo, E., Moret, M., (2001) Organometallics, 20, p. 3390; Ragaini, F., Cenini, S., Tollari, S., (1993) J. Mol. Catal., 85, pp. L1; Ragaini, F., Cenini, S., Gasperini, M., (2001) J. Mol. Catal. A, 174, p. 51; Van Asselt, R., Elsevier, C.J., (1992) Organometallics, 11, p. 1999; Van Asselt, R., Elsevier, C.J., (1994) Tetrahedron, 50, p. 323; Van Asselt, R., Elsevier, C.J., (1994) Organometallics, 13, p. 1972; Grasa, G.A., Hillier, A.C., Nolan, S.P., (2001) Org. Lett., 3, p. 1077; Tollari, S., Cenini, S., Ragaini, F., Cassar, L., (1994) J. Chem. Soc., Chem. Commun., p. 1741; Annunziata, R., Cenini, S., Palmisano, G., Tollari, S., (1996) Synth. Commun., 26, p. 495; Ragaini, F., Sportiello, P., Cenini, S., (1999) J. Organomet. Chem., 577, p. 283; Cenini, S., Bettetini, E., Fedele, M., Tollari, S., (1996) J. Mol. Catal., 111, p. 37; Grasa, G.A., Singh, R., Stevenson, E.D., Nolan, S.P., (2003) J. Organomet. Chem., 687, p. 689; Gasperini, M., Ragaini, F., Cenini, S., (2002) Organometallics, 21, p. 2950; Gasperini, M., Ragaini, F., (2004) Organometallics, 23, p. 995; The mixed Ph,(4-MeC6H4)-BIAN has been mentioned in a table in ref. 10, but its synthesis and properties have not been described; Mäkele, M.J., Korpela, T.K., (1983) Chem. Soc. Rev., 12, p. 309. , and references therein; Bader, R.F.W., Stephens, M.E., (1975) J. Am. Chem. Soc., 97, p. 7391; Bader, R.F.W., (1991) Atoms in Molecules. A Quantum Theory, , Cambridge University Press, Oxford, UK","correspondence_address1":"Ragaini, F.; Dipartimento di Chimica Inorganica, V. G. Venezian 21, I-20133 Milano, Italy; email: fabio.ragaini@unimi.it","issn":"14779226","language":"English","abbrev_source_title":"Dalton Trans.","document_type":"Article","source":"Scopus","bibtex":"@ARTICLE{Gasperini20043376,\nauthor={Gasperini, M. and Ragaini, F. and Gazzola, E. and Caselli, A. and Macchi, P.},\ntitle={Synthesis of mixed Ar,Ar′-BIAN ligands (Ar,Ar′-BIAN = bis(aryl) acenaphthenequinonediimine). Measurement of the coordination strength of hemilabile ligands with respect to their symmetric counterparts},\njournal={Dalton Transactions},\nyear={2004},\nnumber={20},\npages={3376-3382},\ndoi={10.1039/b406582d},\nnote={cited By 43},\nurl={https://www.scopus.com/inward/record.uri?eid=2-s2.0-9244234440&doi=10.1039%2fb406582d&partnerID=40&md5=04995bca47fcb82c997aa73e414078ff},\naffiliation={Dipartimento di Chimica Inorganica, INSM-CNR, V. G. Venezian 21, I-20133 Milano, Italy; Dipartimento di Chimica Strutturale, INSM-CNR, V. G. Venezian 21, I-20133 Milano, Italy},\nabstract={The synthesis of Ar,Ar′-BIAN ligands (Ar,Ar′-BIAN = bis(aryl)acenaphthenequinonediimine) having different aryl groups bound to the two nitrogen atoms is reported for the first time. The ligands were obtained by two different strategies: (i) by a transimination reaction starting from a symmetric Ar,Ar-BIAN ligand having aryl groups bearing strongly electron-withdrawing substituents or (ii) by a two-step-one-pot sequence. The ligands synthesized have been chosen so that the electronic difference between the two aryl groups is very large, but the steric difference is variable and, in one case, the ligand is almost sterically symmetric. The coordination strength of the new ligands towards three palladium complexes has been measured by a competition experiment following a protocol previously described by us. The coordination strength of the mixed ligands is the mean of those of the corresponding symmetric counterparts. The X-ray crystal structure of a palladium π-allyl complex of the electronically asymmetric-sterically symmetric ligand (3,5-(CF3)2C6H3),(3,5-Me 2C6H3)-BIAN has been solved, together with those of the two symmetric analogues to allow a comparison. Despite the fact that the dodecafluorinated ligand has a Keq value about three orders of magnitude lower than the non-fluorinated counterpart, no notable difference is observed in the N-Pd and Pd-Callyl distances in the three complexes. Calculations at the density functional level confirm that Pd-BIAN distances are not strictly correlated to the coordination energies, which are in qualitative agreement with the spectroscopic evidence. The bond length is thus not a good indication of the bond strength in these cases.},\nkeywords={Bond strength (chemical); Catalysis; Copolymerization; Hydrogenation; Synthesis (chemical), Catalytic systems; Coordination strength; Selective hydrogenation, Aromatic compounds},\nreferences={Dvolaitzky, M., (1969) C. R. Acad. Sci. Paris, Ser. C, 268, p. 1811; Dvolaitzky, M., (1969) Chem. Abstr., 71, pp. 61566b; Matei, I., Lixandru, T., (1967) Bull Ist. Politeh. Iasi, 13, p. 245; Matei, I., Lixandru, T., (1969) Chem. Abstr., 70, pp. 3623m; Van Asselt, R., Elsevier, C.J., Smeets, W.J.J., Spek, A.L., Benedix, R., (1994) Red. Trav. Chim. Pays-Bas, 113, p. 88; Van Asselt, R., Elsevier, C.J., (1991) J. Mol. Catal., 65, pp. L13; Ittel, S.D., Johnson, L.K., Brookhart, M., (2000) Chem. Rev., 100, p. 1169; Svejda, S.A., Brookhart, M., (1999) Organometallics, 18, p. 65; Tempel, D.J., Johnson, L.K., Huff, R.L., White, P.S., Brookhart, M., (2000) J. Am. Chem. Soc., 122, p. 6686; Llewellyn, D.B., Adamson, D., Amdtsen, B.A., (2000) Org. Lett., 2, p. 4165; Groen, J.H., Delis, J.G.P., Van Leeuwen, P.W.N.M., Vrieze, K., (1997) Organometallics, 16, p. 68; Van Belzen, R., Hoffmann, H., Elsevier, C.J., (1997) Angew. Chem., Int. Ed. Engl., 36, p. 1743; Van Belzen, R., Klein, R.A., Kooijman, H., Veldman, N., Spek, A.L., Elsevier, C.J., (1998) Organometallics, 17, p. 1812; Van Beizen, R., Elsevier, C.J., Dedieu, A., Veldman, N., Spek, A.L., (2003) Organometallics, 22, p. 722; Shirakawa, E., Yoshida, H., Nakao, Y., Hiyama, T., (1999) J. Am. Chem. Soc., 121, p. 4290; Van Laren, M.W., Elsevier, C.J., (1999) Angew. Chem., Int. Ed., 38, p. 3715; Cenini, S., Ragaini, F., Tollari, S., Paone, D., (1996) J. Am. Chem. Soc., 118, p. 11964; Ragaini, F., Cenini, S., Tollari, S., Tummolillo, G., Beltrami, R., (1999) Organometallics, 18, p. 928; Ragaini, F., Cenini, S., Borsani, E., Dompé, M., Gallo, E., Moret, M., (2001) Organometallics, 20, p. 3390; Ragaini, F., Cenini, S., Tollari, S., (1993) J. Mol. Catal., 85, pp. L1; Ragaini, F., Cenini, S., Gasperini, M., (2001) J. Mol. Catal. A, 174, p. 51; Van Asselt, R., Elsevier, C.J., (1992) Organometallics, 11, p. 1999; Van Asselt, R., Elsevier, C.J., (1994) Tetrahedron, 50, p. 323; Van Asselt, R., Elsevier, C.J., (1994) Organometallics, 13, p. 1972; Grasa, G.A., Hillier, A.C., Nolan, S.P., (2001) Org. Lett., 3, p. 1077; Tollari, S., Cenini, S., Ragaini, F., Cassar, L., (1994) J. Chem. Soc., Chem. Commun., p. 1741; Annunziata, R., Cenini, S., Palmisano, G., Tollari, S., (1996) Synth. Commun., 26, p. 495; Ragaini, F., Sportiello, P., Cenini, S., (1999) J. Organomet. Chem., 577, p. 283; Cenini, S., Bettetini, E., Fedele, M., Tollari, S., (1996) J. Mol. Catal., 111, p. 37; Grasa, G.A., Singh, R., Stevenson, E.D., Nolan, S.P., (2003) J. Organomet. Chem., 687, p. 689; Gasperini, M., Ragaini, F., Cenini, S., (2002) Organometallics, 21, p. 2950; Gasperini, M., Ragaini, F., (2004) Organometallics, 23, p. 995; The mixed Ph,(4-MeC6H4)-BIAN has been mentioned in a table in ref. 10, but its synthesis and properties have not been described; Mäkele, M.J., Korpela, T.K., (1983) Chem. Soc. Rev., 12, p. 309. , and references therein; Bader, R.F.W., Stephens, M.E., (1975) J. Am. Chem. Soc., 97, p. 7391; Bader, R.F.W., (1991) Atoms in Molecules. A Quantum Theory, , Cambridge University Press, Oxford, UK},\ncorrespondence_address1={Ragaini, F.; Dipartimento di Chimica Inorganica, V. G. 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Measurement of the coordination strength of hemilabile ligands with respect to their symmetric counterparts","year":2004}