H. V. Dias and W. Jin, ) 3687; (b) A. Adach, J. Coord. Chem, vol.35, p.757, 1996.

M. Pellei, G. G. Lobbia, G. Papini, C. Santini, and M. Rev, Eur. J. Inorg. Chem, vol.7, p.2312, 2010.

L. F. Soares, D. C. Menezes, R. M. Silva, A. C. Doriguetto, J. Ellena et al., Polyhedron, vol.23, p.205, 2004.

S. Trofimenko-;-b and ). S. Trofimenko, Scorpionates: The Coordination of Poly(pyrazolyl)-borate Ligands, J. Am. Chem. Soc, vol.88, p.1842, 1966.

B. Trofimenko-;-d)-c.-pettinari-;-m.-imran, H. G. Neumann, U. Stammler, M. Monkowius, N. W. Ertl et al., Scorpionates II: Chelating Borate Ligands, vol.93, p.1267, 1993.

F. Tisato, C. Bolzati, A. Duatti, G. Bandoli, and F. Refosco, Inorg. Chem, vol.32, p.2042, 1993.

C. Videira, A. Moura, A. Datta, I. C. Paulo, I. Santos et al., Inog. Chem, vol.48, p.4251, 2009.

J. M. Masui, ;. Mayer, L. Videira, A. Maria, and I. Paulo, Inorg. Chim. Acta, vol.251, p.325, 1996.

I. Santos, P. D. Santos, M. J. Vaz, M. Calhorda-;-e)-l, A. Paulo et al., J. Am. Chem. Soc, vol.27, p.14590, 2006.

M. J. Abrams, A. Davison, and A. G. Jones, Inorg. Chim. Acta, vol.82, p.125, 1984.

S. Schlecht and J. F. Hartwig, J. Am. Chem. Soc, vol.122, p.9435, 2000.

T. Kakizawa, Y. Kawano, and M. Shimoi, Organometallics, vol.20, p.3213, 2001.

L. A. Graham, A. R. Fout, K. R. Kuehne, J. L. White, B. Mookherji et al.,

A. L. Zakharov, D. Rheingold, D. Rabinovich, and . Trans, , p.171, 2005.

M. Bolte, D. T. Wagner, M. A. ;-c)-f.-hossain, C. T. Rigsby, P. L. Duncan et al., , p.2303, 2003.

M. H. Baik and F. A. Schultz, Inorg. Chem, vol.46, p.2596, 2007.

A. P. Forshaw, J. M. Smith, A. Ozarowski, J. Krzystek, D. Smirnov et al.,

J. M. Karunadasa, A. Zadrozny, K. Schnegg, T. A. Holldack, A. Jackson et al., 144; (b), vol.52, p.485, 2004.

R. S. Anju, D. K. Roy, B. Mondal, K. Yuvaraj, C. Arivazhagan et al., Angew. Chem., Int. Ed, vol.53, p.2873, 2014.

). D. Roy, R. Borthakur, S. Bhattacharyya, V. Ramkumar, and S. Ghosh, J. Organomet. Chem, vol.21, p.132, 2015.

S. Phukan, . K. Ghosh-;-e)-d, B. Roy, R. S. Mondal, S. Anju et al., Chem. Eur. J, vol.21, p.3640, 2015.

C. Ghosh, ). B. Mondal, R. Borthakur, S. Ghosh-;-h, ). K. Saha et al., In Organometallic Chemistry and Catalysis of Transition Metal-Borane Compounds, Chem. Eur. J, vol.22, p.246, 2016.

B. Ramalakshmi, S. Varghese, and . Ghosh, Proc. Natl. Acad. Sci., India, vol.86, p.521, 2016.

K. Saha, U. Kaur, S. Kar, B. Mondal, and . Joseph, Inorg. Chem, 2019.

H. Vahrenkamp-;-c.-kimblin, B. M. Bridgewater, T. Hascall, and G. Parkin, Acc. Chem. Res, vol.32, p.891, 1999.

C. Carmona, M. D. Spicer, J. ;. Reglinski, K. E. Morlok, G. Janak et al., Angew. Chem., Int. Ed, vol.213, p.7170, 2001.

A. Rawe, G. J. Iannetelli, S. J. Tizzard, A. J. Coles, G. R. Guwy et al., Inorg. Chem, vol.58, p.359, 2019.

A. Kumar, N. A. Beattie, S. D. Pike, S. A. Macgregor, A. S. Weller-;-j et al., Coordination of Lewis Acids to Transition Metals: Z-Type Ligands, vol.55, p.3924, 2010.

K. Saha, R. Ramalakshmi, S. Gomosta, K. Pathak, V. Dorcet et al., Chem. Eur. J, vol.23, p.9812, 2017.

D. R. Dauer, M. Flügge, R. H. Irmer, and D. Stalke, Dalton Trans, vol.45, p.6136, 2016.

G. E. Ryschkewitsch and K. C. Nainan, Inorg. Synth, vol.15, p.113, 1974.

, Due to low yield of compound 2, the 1 H and 13 C{ 1 H} NMR spectra are not impressive and the spectroscopic assignments for compound 2 are not reported here

, The total yields of 5b and 5c were ?19%

A. Altomare, G. Cascarano, C. Giacovazzo, A. Guagliardi, M. C. Burla et al., J. Appl. Cryst, vol.27, p.435, 1994.

G. M. Sheldrick, Acta Cryst. A71, p.3, 2015.

G. M. Sheldrick, Acta Cryst. C71, p.3, 2015.

G. Bandoli, A. Dolmella, T. I. Gerbe, D. Luzipo, and J. G. Du-preez, Inorg. Chim. Acta, vol.325, p.215, 2001.

T. Yasue, Y. Kawano, and M. Shimoi, Angew. Chem., Int. Ed, vol.42, p.1727, 2003.

R. M. Meier and T. P. Hanusa, Structural Organomanganese Chemistry in PATAI'S Chemistry of Functional Groups, 2011.

G. Wilkinson and R. D. Gillard, Comprehensive Coordination Chemistry, 1987.

, Comprehensive Coordination Chemistry II, 2004.

C. A. Mcauliffe, W. Levason, and P. , Arsine and Stibine Complexes of the Transition Elements, 1979.

G. O. Spessard and G. L. Miessler, Organometallic Chemistry, 1997.

N. Fey, A. G. Orpen, and J. N. Harvey, Coord. Chem. Rev, vol.253, p.704, 2009.

P. W. Van-leeuwen-;-b)-r and . Crabtree, The Organometallic Chemistry of the Transition Metals, Activation of Small Molecules: Organometallic and Bioinorganic Perspectives, 2004.

J. G. Raj, Rev. Inorg. Chem, vol.35, p.2860, 2011.

A. Phanopoulos, N. J. Long, and P. W. Miller, Triphosphine Ligands: Coordination Chemistry and Recent Catalytic Applications, Struct. Bonding, vol.171, p.141, 2016.

C. E. Rickard, W. R. Roper, A. Williamson, and L. J. Wright, Organometallics, vol.21, p.4862, 2002.

C. E. Irvine, W. R. Rickard, A. Roper, L. J. Williamson, and . Wright, Angew. Chem., Int. Ed, vol.39, p.948, 2000.

, Geometry optimization was performed at the BP86/Def2-SVP level of theory. For full details see Supporting Information

H. V. Dias and W. Jin, ) 3687; (b) A. Adach, J. Coord. Chem, vol.35, p.757, 1996.

M. Pellei, G. G. Lobbia, G. Papini, C. Santini, and M. Rev, Eur. J. Inorg. Chem, vol.7, p.2312, 2010.

L. F. Soares, D. C. Menezes, R. M. Silva, A. C. Doriguetto, J. Ellena et al., Polyhedron, vol.23, p.205, 2004.

S. Trofimenko-;-b and ). S. Trofimenko, Scorpionates: The Coordination of Poly(pyrazolyl)-borate Ligands, J. Am. Chem. Soc, vol.88, p.1842, 1966.

B. Trofimenko-;-d)-c.-pettinari-;-m.-imran, H. G. Neumann, U. Stammler, M. Monkowius, N. W. Ertl et al., Scorpionates II: Chelating Borate Ligands, vol.93, p.1267, 1993.

F. Tisato, C. Bolzati, A. Duatti, G. Bandoli, and F. Refosco, Inorg. Chem, vol.32, p.2042, 1993.

C. Videira, A. Moura, A. Datta, I. C. Paulo, I. Santos et al., Inog. Chem, vol.48, p.4251, 2009.

J. M. Masui, ;. Mayer, L. Videira, A. Maria, and I. Paulo, Inorg. Chim. Acta, vol.251, p.325, 1996.

I. Santos, P. D. Santos, M. J. Vaz, M. Calhorda-;-e)-l, A. Paulo et al., J. Am. Chem. Soc, vol.27, p.14590, 2006.

M. J. Abrams, A. Davison, and A. G. Jones, Inorg. Chim. Acta, vol.82, p.125, 1984.

S. Schlecht and J. F. Hartwig, J. Am. Chem. Soc, vol.122, p.9435, 2000.

T. Kakizawa, Y. Kawano, and M. Shimoi, Organometallics, vol.20, p.3213, 2001.

L. A. Graham, A. R. Fout, K. R. Kuehne, J. L. White, B. Mookherji et al.,

A. L. Zakharov, D. Rheingold, D. Rabinovich, and . Trans, , p.171, 2005.

M. Bolte, D. T. Wagner, M. A. ;-c)-f.-hossain, C. T. Rigsby, P. L. Duncan et al., , p.2303, 2003.

M. H. Baik and F. A. Schultz, Inorg. Chem, vol.46, p.2596, 2007.

A. P. Forshaw, J. M. Smith, A. Ozarowski, J. Krzystek, D. Smirnov et al.,

J. M. Karunadasa, A. Zadrozny, K. Schnegg, T. A. Holldack, A. Jackson et al., 144; (b), vol.52, p.485, 2004.

R. S. Anju, D. K. Roy, B. Mondal, K. Yuvaraj, C. Arivazhagan et al., Angew. Chem., Int. Ed, vol.53, p.2873, 2014.

). D. Roy, R. Borthakur, S. Bhattacharyya, V. Ramkumar, and S. Ghosh, J. Organomet. Chem, vol.21, p.132, 2015.

S. Phukan, . K. Ghosh-;-e)-d, B. Roy, R. S. Mondal, S. Anju et al., Chem. Eur. J, vol.21, p.3640, 2015.

C. Ghosh, ). B. Mondal, R. Borthakur, S. Ghosh-;-h, ). K. Saha et al., In Organometallic Chemistry and Catalysis of Transition Metal-Borane Compounds, Chem. Eur. J, vol.22, p.246, 2016.

B. Ramalakshmi, S. Varghese, and . Ghosh, Proc. Natl. Acad. Sci., India, vol.86, p.521, 2016.

K. Saha, U. Kaur, S. Kar, B. Mondal, and . Joseph, Inorg. Chem, 2019.

H. Vahrenkamp-;-c.-kimblin, B. M. Bridgewater, T. Hascall, and G. Parkin, Acc. Chem. Res, vol.32, p.891, 1999.

C. Carmona, M. D. Spicer, J. ;. Reglinski, K. E. Morlok, G. Janak et al., Angew. Chem., Int. Ed, vol.213, p.7170, 2001.

A. Rawe, G. J. Iannetelli, S. J. Tizzard, A. J. Coles, G. R. Guwy et al., Inorg. Chem, vol.58, p.359, 2019.

A. Kumar, N. A. Beattie, S. D. Pike, S. A. Macgregor, A. S. Weller-;-j et al., Coordination of Lewis Acids to Transition Metals: Z-Type Ligands, vol.55, p.3924, 2010.

K. Saha, R. Ramalakshmi, S. Gomosta, K. Pathak, V. Dorcet et al., Chem. Eur. J, vol.23, p.9812, 2017.

D. R. Dauer, M. Flügge, R. H. Irmer, and D. Stalke, Dalton Trans, vol.45, p.6136, 2016.

G. E. Ryschkewitsch and K. C. Nainan, Inorg. Synth, vol.15, p.113, 1974.

, Due to low yield of compound 2, the 1 H and 13 C{ 1 H} NMR spectra are not impressive and the spectroscopic assignments for compound 2 are not reported here

, The total yields of 5b and 5c were ?19%

A. Altomare, G. Cascarano, C. Giacovazzo, A. Guagliardi, M. C. Burla et al., J. Appl. Cryst, vol.27, p.435, 1994.

G. M. Sheldrick, Acta Cryst. A71, p.3, 2015.

G. M. Sheldrick, Acta Cryst. C71, p.3, 2015.

G. Bandoli, A. Dolmella, T. I. Gerbe, D. Luzipo, and J. G. Du-preez, Inorg. Chim. Acta, vol.325, p.215, 2001.

T. Yasue, Y. Kawano, and M. Shimoi, Angew. Chem., Int. Ed, vol.42, p.1727, 2003.

R. M. Meier and T. P. Hanusa, Structural Organomanganese Chemistry in PATAI'S Chemistry of Functional Groups, 2011.

G. Wilkinson and R. D. Gillard, Comprehensive Coordination Chemistry, 1987.

, Comprehensive Coordination Chemistry II, 2004.

C. A. Mcauliffe, W. Levason, and P. , Arsine and Stibine Complexes of the Transition Elements, 1979.

G. O. Spessard and G. L. Miessler, Organometallic Chemistry, 1997.

N. Fey, A. G. Orpen, and J. N. Harvey, Coord. Chem. Rev, vol.253, p.704, 2009.

P. W. Van-leeuwen-;-b)-r and . Crabtree, The Organometallic Chemistry of the Transition Metals, Activation of Small Molecules: Organometallic and Bioinorganic Perspectives, 2004.

J. G. Raj, Rev. Inorg. Chem, vol.35, p.2860, 2011.

A. Phanopoulos, N. J. Long, and P. W. Miller, Triphosphine Ligands: Coordination Chemistry and Recent Catalytic Applications, Struct. Bonding, vol.171, p.141, 2016.

C. E. Rickard, W. R. Roper, A. Williamson, and L. J. Wright, Organometallics, vol.21, p.4862, 2002.

C. E. Irvine, W. R. Rickard, A. Roper, L. J. Williamson, and . Wright, Angew. Chem., Int. Ed, vol.39, p.948, 2000.

, Geometry optimization was performed at the BP86/Def2-SVP level of theory. For full details see Supporting Information