10. Wieczorek B, Dijkstra HP, Egmond MR, Klein Gebbink RJM, van Koten G (2009) Incorporating ECE-pincer metal complexes as functional building blocks in semisynthetic
metalloenzymes, supramolecular polypeptide hybrids, tamoxifen derivatives, biomarkers and
sensors. J Organomet Chem 694(6):812–822. https://doi.org/10.1016/j.jorganchem.2008.12.
010
11. Suijkerbuijk BMJM, Schamhart DJ, Kooijman H, Spek AL, van Koten G, Klein Gebbink RJM
(2010) Mono(NCN-pincer palladium)-metalloporphyrin catalysts: evidence for supramolecular bimetallic catalysis. Dalton Trans 39:6198–6216. https://doi.org/10.1039/b925236n
12. Jurgens S, Kuhn FE, Casini A (2018) Cyclometalated complexes of platinum and gold with
biological properties: state-of-the-art and future perspectives. Curr Med Chem 25(4):437–461.
https://doi.org/10.2174/0929867324666170529125229
13. Junge K, Papa V, Beller M (2019) Cobalt-pincer complexes in catalysis. Chem Eur J 25
(1):122–143. https://doi.org/10.1002/chem.201803016
14. Liu J-K, Gong J-F, Song M-P (2019) Chiral palladium pincer complexes for asymmetric
catalytic reactions. Org Biomol Chem 17(25):6069–6098. https://doi.org/10.1039/
c9ob00401g
15. Dehand J, Pfeffer M (1976) Cyclometallated compounds. Coord Chem Rev 18(3):327–352.
https://doi.org/10.1016/s0010-8545(00)80431-2
16. Shaw BL (1975) Formation of large rings, internal metalation reactions, and internal entropy
effects. J Am Chem Soc 97(13):3856–3857. https://doi.org/10.1021/ja00846a072
17. Riehl JF, Jean Y, Eisenstein O, Pelissier M (1992) Theoretical study of the structures of
electron-deficient d 6 ML 5 Pi complexes. Importance of a .Pi.-donating ligand. Organometallics
11(2):729–737. https://doi.org/10.1021/om00038a035
18. van de Kuil LA, Luitjes H, Grove DM, Zwikker JW, van der Linden JGM, Roelofsen AM,
Jenneskens LW, Drenth W, van Koten G (1994) Electronic tuning of arylnickel(II) complexes
by para substitution of the terdentate monoanionic 2,6-bis[(dimethylamino)methyl]phenyl
ligand. Organometallics 13:468–477. https://doi.org/10.1021/om00014a020
19. Mohammad HAY, Grimm JC, Eichele K, Mack H-G, Speiser B, Novak F, Quintanilla MG,
Kaska WC, Mayer HA (2002) CÀH oxidative addition with a (PCP)Ir(III)-pincer complex.
Organometallics 21(26):5775–5784. https://doi.org/10.1021/om020621w
20. Batema GD, Lutz M, Spek AL, van Walree CA, de Mello DC, Meijerink A, Havenith RWA,
Perez-Moreno J, Clays K, Buechel M, van Dijken A, Bryce DL, van Klink GPM, van Koten G
(2008) Substituted 4,4
0 -stilbenoid NCN-pincer platinum(II) complexes. Luminescence and
tuning of the electronic and NLO properties and the application in an OLED. Organometallics
27(8):1690–1701. https://doi.org/10.1021/om700352z
21. Roddick DM (2013) Tuning of PCP pincer ligand electronic and steric properties. Top
Organomet Chem 40:49–88. https://doi.org/10.1007/978-3-642-31081-2_3
22. Crocker C, Empsall HD, Errington RJ, Hyde EM, McDonald WS, Markham R, Norton MC,
Shaw BL, Weeks B (1982) Transition metal–carbon bonds. Part 52. Large ring and
cyclometallated complexes formed from Bu
t
2 PCH 2 CH 2 CHRCH 2 CH 2 PBu
t
2 (R¼ H or Me)
and IrCl 3 , or [Ir 2 Cl 4 (cyclo-octene) 4 ] : crystal structures of the cyclometallated hydride,
[IrHCl(Bu
t
2 PCH 2 CH 2 CHCH 2 CH 2 PBu
t
2 )],
and
the
carbene
complex
[IrCl
(Bu
t
2 PCH 2 CH 2 CCH 2 CH 2 PBu
t
2 )]. J Chem Soc Dalton Trans 7:1217–1224
23. Errington RJ, McDonald WS, Shaw BL (1982) Transition metal-carbon bonds. Part 54.
Complexes of palladium, platinum, rhodium, and iridium with (Me 3 C) 2 PCH 2 CHMe(CH 2 ) 3 P
(CMe 3 ) 2 . Crystal structures of [2-methyl-1,5-bis(di-tert-butylphosphino)pent-3-yl-C 3 PP']
chloropalladium(II) and -chlorohydridoiridium(III). J Chem Soc Dalton Trans:1829–1835
24. Vigalok A, Milstein D (2000) Direct synthesis of thermally stable PCP-type rhodium carbenes.
Organometallics 19(11):2061–2064. https://doi.org/10.1021/om990764r
25. Polukeev AV, Wendt OF (2018) Iridium complexes with aliphatic, non-innocent pincer
ligands. J Organomet Chem 867:33–50. https://doi.org/10.1016/j.jorganchem.2017.12.009
26. O'Reilly ME, Veige AS (2014) Trianionic pincer and pincer-type metal complexes and
catalysts. Chem Soc Rev 43(17):6325–6369. https://doi.org/10.1039/C4CS00111G
128
A. Singh et al.
metalloenzymes, supramolecular polypeptide hybrids, tamoxifen derivatives, biomarkers and
sensors. J Organomet Chem 694(6):812–822. https://doi.org/10.1016/j.jorganchem.2008.12.
010
11. Suijkerbuijk BMJM, Schamhart DJ, Kooijman H, Spek AL, van Koten G, Klein Gebbink RJM
(2010) Mono(NCN-pincer palladium)-metalloporphyrin catalysts: evidence for supramolecular bimetallic catalysis. Dalton Trans 39:6198–6216. https://doi.org/10.1039/b925236n
12. Jurgens S, Kuhn FE, Casini A (2018) Cyclometalated complexes of platinum and gold with
biological properties: state-of-the-art and future perspectives. Curr Med Chem 25(4):437–461.
https://doi.org/10.2174/0929867324666170529125229
13. Junge K, Papa V, Beller M (2019) Cobalt-pincer complexes in catalysis. Chem Eur J 25
(1):122–143. https://doi.org/10.1002/chem.201803016
14. Liu J-K, Gong J-F, Song M-P (2019) Chiral palladium pincer complexes for asymmetric
catalytic reactions. Org Biomol Chem 17(25):6069–6098. https://doi.org/10.1039/
c9ob00401g
15. Dehand J, Pfeffer M (1976) Cyclometallated compounds. Coord Chem Rev 18(3):327–352.
https://doi.org/10.1016/s0010-8545(00)80431-2
16. Shaw BL (1975) Formation of large rings, internal metalation reactions, and internal entropy
effects. J Am Chem Soc 97(13):3856–3857. https://doi.org/10.1021/ja00846a072
17. Riehl JF, Jean Y, Eisenstein O, Pelissier M (1992) Theoretical study of the structures of
electron-deficient d 6 ML 5 Pi complexes. Importance of a .Pi.-donating ligand. Organometallics
11(2):729–737. https://doi.org/10.1021/om00038a035
18. van de Kuil LA, Luitjes H, Grove DM, Zwikker JW, van der Linden JGM, Roelofsen AM,
Jenneskens LW, Drenth W, van Koten G (1994) Electronic tuning of arylnickel(II) complexes
by para substitution of the terdentate monoanionic 2,6-bis[(dimethylamino)methyl]phenyl
ligand. Organometallics 13:468–477. https://doi.org/10.1021/om00014a020
19. Mohammad HAY, Grimm JC, Eichele K, Mack H-G, Speiser B, Novak F, Quintanilla MG,
Kaska WC, Mayer HA (2002) CÀH oxidative addition with a (PCP)Ir(III)-pincer complex.
Organometallics 21(26):5775–5784. https://doi.org/10.1021/om020621w
20. Batema GD, Lutz M, Spek AL, van Walree CA, de Mello DC, Meijerink A, Havenith RWA,
Perez-Moreno J, Clays K, Buechel M, van Dijken A, Bryce DL, van Klink GPM, van Koten G
(2008) Substituted 4,4
0 -stilbenoid NCN-pincer platinum(II) complexes. Luminescence and
tuning of the electronic and NLO properties and the application in an OLED. Organometallics
27(8):1690–1701. https://doi.org/10.1021/om700352z
21. Roddick DM (2013) Tuning of PCP pincer ligand electronic and steric properties. Top
Organomet Chem 40:49–88. https://doi.org/10.1007/978-3-642-31081-2_3
22. Crocker C, Empsall HD, Errington RJ, Hyde EM, McDonald WS, Markham R, Norton MC,
Shaw BL, Weeks B (1982) Transition metal–carbon bonds. Part 52. Large ring and
cyclometallated complexes formed from Bu
t
2 PCH 2 CH 2 CHRCH 2 CH 2 PBu
t
2 (R¼ H or Me)
and IrCl 3 , or [Ir 2 Cl 4 (cyclo-octene) 4 ] : crystal structures of the cyclometallated hydride,
[IrHCl(Bu
t
2 PCH 2 CH 2 CHCH 2 CH 2 PBu
t
2 )],
and
the
carbene
complex
[IrCl
(Bu
t
2 PCH 2 CH 2 CCH 2 CH 2 PBu
t
2 )]. J Chem Soc Dalton Trans 7:1217–1224
23. Errington RJ, McDonald WS, Shaw BL (1982) Transition metal-carbon bonds. Part 54.
Complexes of palladium, platinum, rhodium, and iridium with (Me 3 C) 2 PCH 2 CHMe(CH 2 ) 3 P
(CMe 3 ) 2 . Crystal structures of [2-methyl-1,5-bis(di-tert-butylphosphino)pent-3-yl-C 3 PP']
chloropalladium(II) and -chlorohydridoiridium(III). J Chem Soc Dalton Trans:1829–1835
24. Vigalok A, Milstein D (2000) Direct synthesis of thermally stable PCP-type rhodium carbenes.
Organometallics 19(11):2061–2064. https://doi.org/10.1021/om990764r
25. Polukeev AV, Wendt OF (2018) Iridium complexes with aliphatic, non-innocent pincer
ligands. J Organomet Chem 867:33–50. https://doi.org/10.1016/j.jorganchem.2017.12.009
26. O'Reilly ME, Veige AS (2014) Trianionic pincer and pincer-type metal complexes and
catalysts. Chem Soc Rev 43(17):6325–6369. https://doi.org/10.1039/C4CS00111G
128
A. Singh et al.