96. Kiernicki JJ, Zeller M, Szymczak NK (2017) Hydrazine capture and N-N bond cleavage at
Iron enabled by flexible appended Lewis acids. J Am Chem Soc 139(50):18194–18197.
https://doi.org/10.1021/jacs.7b11465
97. Kiernicki JJ, Zeller M, Szymczak NK (2019) Requirements for Lewis acid-mediated capture
and N-N bond cleavage of hydrazine at Iron. Inorg Chem 58(2):1147–1154. https://doi.org/10.
1021/acs.inorgchem.8b02433
98. Geri JB, Szymczak NK (2015) A proton-switchable bifunctional ruthenium complex that
catalyzes nitrile hydroboration. J Am Chem Soc 137(40):12808–12814. https://doi.org/10.
1021/jacs.5b08406
99. Fujita K-I, Tanino N, Yamaguchi R (2007) Ligand-promoted dehydrogenation of alcohols
catalyzed by CpIr complexes. A new catalytic system for oxidant-free oxidation of alcohols.
Org Lett 9(1):109–111. https://doi.org/10.1021/ol062806v
100. Kawahara R, Fujita K-I, Yamaguchi R (2012) Cooperative catalysis by iridium complexes
with a bipyridonate ligand: versatile dehydrogenative oxidation of alcohols and reversible
dehydrogenation-hydrogenation between 2-propanol and acetone. Angew Chem Int Ed 51
(51):12790–12794. https://doi.org/10.1002/anie.201206987
101. Saha B, Wahidur Rahaman SM, Daw P, Sengupta G, Bera JK (2014) Metal–ligand cooperation on a diruthenium platform: selective imine formation through acceptorless
dehydrogenative coupling of alcohols with amines. Chem Eur J 20(21):6542–6551. https://
doi.org/10.1002/chem.201304403
102. Tseng K-NT, Kampf JW, Szymczak NK (2016) Modular attachment of appended boron Lewis
acids to a ruthenium pincer catalyst: metal-ligand cooperativity enables selective alkyne
hydrogenation. J Am Chem Soc 138(33):10378–10381. https://doi.org/10.1021/jacs.6b03972
103. Zell T, Milstein D (2015) Hydrogenation and dehydrogenation Iron pincer catalysts capable of
metal-ligand cooperation by aromatization/dearomatization. Acc Chem Res 48(7):1979–1994.
https://doi.org/10.1021/acs.accounts.5b00027
104. Smith J, Ariga K, Anslyn EV (1993) Enhanced imidazole-catalyzed RNA cleavage induced by
a bis-alkylguanidinium receptor. J Am Chem Soc 115(1):362–364. https://doi.org/10.1021/
ja00054a062
105. Aït-Haddou H, Sumaoka J, Wiskur SL, Folmer-Andersen JF, Anslyn EV (2002) Remarkable
cooperativity between a ZnII ion and guanidinium/ammonium groups in the hydrolysis of
RNA. Angew Chem Int Ed 41(21):4013–4016. https://doi.org/10.1002/1521-3773(20021104)
41:21<4013::AID-ANIE4013>3.0.CO;2-Y
106. Kendall AJ, Zakharov LN, Gilbertson JD (2010) Synthesis and stabilization of a monomeric
Iron(II) hydroxo complex via intramolecular hydrogen bonding in the secondary coordination
sphere. Inorg Chem 49(19):8656–8658. https://doi.org/10.1021/ic101408e
107. Delgado M, Sommer SK, Swanson SP, Berger RF, Seda T, Zakharov LN, Gilbertson JD
(2015) Probing the protonation state and the redox-active sites of pendant base iron(II) and
zinc(II) pyridinediimine complexes. Inorg Chem 54(15):7239–7248. https://doi.org/10.1021/
acs.inorgchem.5b00633
108. Delgado M, Ziegler JM, Seda T, Zakharov LN, Gilbertson JD (2016) Pyridinediimine Iron
complexes with pendant redox-inactive metals located in the secondary coordination sphere.
Inorg Chem 55(2):555–557. https://doi.org/10.1021/acs.inorgchem.5b02544
109. Hartle MD, Delgado M, Gilbertson JD, Pluth MD (2016) Stabilization of a Zn(II) hydrosulfido
complex utilizing a hydrogen-bond accepting ligand. Chem Commun 52(49):7680–7682.
https://doi.org/10.1039/C6CC01373B
110. Kwon YM, Delgado M, Zakharov LN, Seda T, Gilbertson JD (2016) Nitrite reduction by a
pyridinediimine complex with a proton-responsive secondary coordination sphere. Chem
Commun 52(73):11016–11019. https://doi.org/10.1039/C6CC05962G
111. Delgado M, Gilbertson JD (2017) Ligand-based reduction of nitrate to nitric oxide utilizing a
proton-responsive secondary coordination sphere. Chem Commun 53(81):11249–11252.
https://doi.org/10.1039/C7CC06541H
Cooperative Reactivity by Pincer-Type Complexes Possessing Secondary. . .
133
Iron enabled by flexible appended Lewis acids. J Am Chem Soc 139(50):18194–18197.
https://doi.org/10.1021/jacs.7b11465
97. Kiernicki JJ, Zeller M, Szymczak NK (2019) Requirements for Lewis acid-mediated capture
and N-N bond cleavage of hydrazine at Iron. Inorg Chem 58(2):1147–1154. https://doi.org/10.
1021/acs.inorgchem.8b02433
98. Geri JB, Szymczak NK (2015) A proton-switchable bifunctional ruthenium complex that
catalyzes nitrile hydroboration. J Am Chem Soc 137(40):12808–12814. https://doi.org/10.
1021/jacs.5b08406
99. Fujita K-I, Tanino N, Yamaguchi R (2007) Ligand-promoted dehydrogenation of alcohols
catalyzed by CpIr complexes. A new catalytic system for oxidant-free oxidation of alcohols.
Org Lett 9(1):109–111. https://doi.org/10.1021/ol062806v
100. Kawahara R, Fujita K-I, Yamaguchi R (2012) Cooperative catalysis by iridium complexes
with a bipyridonate ligand: versatile dehydrogenative oxidation of alcohols and reversible
dehydrogenation-hydrogenation between 2-propanol and acetone. Angew Chem Int Ed 51
(51):12790–12794. https://doi.org/10.1002/anie.201206987
101. Saha B, Wahidur Rahaman SM, Daw P, Sengupta G, Bera JK (2014) Metal–ligand cooperation on a diruthenium platform: selective imine formation through acceptorless
dehydrogenative coupling of alcohols with amines. Chem Eur J 20(21):6542–6551. https://
doi.org/10.1002/chem.201304403
102. Tseng K-NT, Kampf JW, Szymczak NK (2016) Modular attachment of appended boron Lewis
acids to a ruthenium pincer catalyst: metal-ligand cooperativity enables selective alkyne
hydrogenation. J Am Chem Soc 138(33):10378–10381. https://doi.org/10.1021/jacs.6b03972
103. Zell T, Milstein D (2015) Hydrogenation and dehydrogenation Iron pincer catalysts capable of
metal-ligand cooperation by aromatization/dearomatization. Acc Chem Res 48(7):1979–1994.
https://doi.org/10.1021/acs.accounts.5b00027
104. Smith J, Ariga K, Anslyn EV (1993) Enhanced imidazole-catalyzed RNA cleavage induced by
a bis-alkylguanidinium receptor. J Am Chem Soc 115(1):362–364. https://doi.org/10.1021/
ja00054a062
105. Aït-Haddou H, Sumaoka J, Wiskur SL, Folmer-Andersen JF, Anslyn EV (2002) Remarkable
cooperativity between a ZnII ion and guanidinium/ammonium groups in the hydrolysis of
RNA. Angew Chem Int Ed 41(21):4013–4016. https://doi.org/10.1002/1521-3773(20021104)
41:21<4013::AID-ANIE4013>3.0.CO;2-Y
106. Kendall AJ, Zakharov LN, Gilbertson JD (2010) Synthesis and stabilization of a monomeric
Iron(II) hydroxo complex via intramolecular hydrogen bonding in the secondary coordination
sphere. Inorg Chem 49(19):8656–8658. https://doi.org/10.1021/ic101408e
107. Delgado M, Sommer SK, Swanson SP, Berger RF, Seda T, Zakharov LN, Gilbertson JD
(2015) Probing the protonation state and the redox-active sites of pendant base iron(II) and
zinc(II) pyridinediimine complexes. Inorg Chem 54(15):7239–7248. https://doi.org/10.1021/
acs.inorgchem.5b00633
108. Delgado M, Ziegler JM, Seda T, Zakharov LN, Gilbertson JD (2016) Pyridinediimine Iron
complexes with pendant redox-inactive metals located in the secondary coordination sphere.
Inorg Chem 55(2):555–557. https://doi.org/10.1021/acs.inorgchem.5b02544
109. Hartle MD, Delgado M, Gilbertson JD, Pluth MD (2016) Stabilization of a Zn(II) hydrosulfido
complex utilizing a hydrogen-bond accepting ligand. Chem Commun 52(49):7680–7682.
https://doi.org/10.1039/C6CC01373B
110. Kwon YM, Delgado M, Zakharov LN, Seda T, Gilbertson JD (2016) Nitrite reduction by a
pyridinediimine complex with a proton-responsive secondary coordination sphere. Chem
Commun 52(73):11016–11019. https://doi.org/10.1039/C6CC05962G
111. Delgado M, Gilbertson JD (2017) Ligand-based reduction of nitrate to nitric oxide utilizing a
proton-responsive secondary coordination sphere. Chem Commun 53(81):11249–11252.
https://doi.org/10.1039/C7CC06541H
Cooperative Reactivity by Pincer-Type Complexes Possessing Secondary. . .
133