Full Paper
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C 53.98, H 5.80, N 4.74. FTIR (KBr disc): ν = 3410 (br), 3055 (s), 2928
˜
(vs), 2350 (br), 112 (s), 1049 (s), 1016 (s), 881 (vs), 793 (s), 741 (s),
580 (s) cm–1. ESI-MS: calcd. for C54H54N6O8P2Ni2Cl2 [M + H]+ 1165;
found 1165.
3: M.p. >250 °C. Yield 0.130
g (49 % based on dippH2).
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C40H52ClCoN3O10P2 (891.20): calcd. C 53.91, H 5.88, N 4.72; found C
53.23, H 4.92, N 6.56. FTIR (KBr disc): ν = 3410 (br), 2963 (vs), 2390
˜
(br), 1592 (s), 1162 (s), 933 (s), 925 (vs), 769 (s), 741 (s), 580 (s), 538
(s) cm–1. ESI-MS: calcd. for C54H54N6O8P2Co2Cl2 [M + H]+ 1165; found
1165.
[8]
Oxidation of Alcohols: Before the reaction, a two-necked flask was
equipped with a magnetic bar, and then the catalyst (0.5 mol-%),
CH3CN (10 mL), substrate (alcohol, 10 mmol), and 70 % aqueous
TBHP (1 equiv.) were added successively. The resultant catalytic mix-
ture was heated under reflux at 80 °C for 4 h. Aliquots were re-
moved and diluted with ethyl acetate for the GC–MS analysis. An
Agilent Technologies 5975C GC–MS system was used to monitor
the oxidation of the alcohols. Two separate blank experiments (one
without oxidant and one without catalyst) were also performed
with all other conditions unaltered.
Single-Crystal X-ray Diffraction Studies: The single-crystal X-ray
diffraction data for 1 and 3 were recorded with a Rigaku Saturn
724+ CCD diffractometer with a Mo-Kα radiation source (λ =
0.71075 Å) at 150 K. The crystal Clear-SM Expert software was used
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were solved by direct methods with SIR-92.[36] The final structure
refinements were performed by full least-squares methods on F2
with SHELXL-2014.[37] All non-hydrogen atoms were refined aniso-
tropically. The hydrogen atoms were refined isotropically as rigid
atoms in their idealized locations.
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CCDC 1571740 (for 1) and 1571741 (for 3) contain the supplemen-
Acknowledgments
R. M. is grateful to SERB, New Delhi for a JC Bose Fellowship
(SB/S2/JCB-85/2014), through which this research was carried
out. G. B. thanks the University Grants Commission (UGC), New
Delhi for providing a fellowship. R. A. thanks the Department of
Science and Technology (DST), SERB for a National Postdoctoral
Fellowship (NPDF/ 2016/00037).
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Keywords: Phosphate ligands · Alcohols · Oxidation ·
Homogeneous catalysis · Structure elucidation
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