(IUCr) Crystallography Journals Online

Abstract top

In the title compound, K₃[Cu(C₁₀H₁₂N₂O₁₀P)]·2H₂O, the Cu^II ion, one potassium cation and a P atom are situated on a twofold rotation axis. The Cu^II ion is coordinated by two N and four O atoms from one bis{[bis(carboxylatomethyl)amino]methyl}phosphinate ligand in a distorted octahedral coordination geometry. The two crystallographically independent potassium ions exhibit different coordination environments. The potassium ion in a general position is heptacoordinated by five carboxylate O atoms, one phosphinate O atom and one water molecule [K-O = 2.718 (3)-3.040 (3) Å], and the potassium ion situated on the twofold rotation axis is hexacoordinated by four carboxylate O atoms and two water molecules [K-O = 2.618 (3)-2.771 (3) Å]. The water molecules are also involved in formation of intermolecular O-HO hydrogen bonds.

Tripotassium (bis{[bis(carboxylatomethyl)amino]methyl}phosphinato)cuprate(II) dihydrate top

Crystal data top

K₃[Cu(C₁₀H₁₂N₂O₁₀P)]·2H₂O	F(000) = 574
M_r = 568.06	D_x = 1.969 Mg m⁻³
Orthorhombic, P2₁2₁2	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: P 2 2ab	Cell parameters from 376 reflections
a = 11.880 (7) Å	θ = 2.6–22.8°
b = 8.332 (5) Å	µ = 1.94 mm⁻¹
c = 9.681 (6) Å	T = 273 K
V = 958.2 (10) Å³	Block, blue
Z = 2	0.25 × 0.20 × 0.15 mm

Data collection top

Bruker SMART CCD area-detector diffractometer	1686 independent reflections
Radiation source: fine-focus sealed tube	1553 reflections with I > 2σ(I)
graphite	R_int = 0.041
phi and ω scans	θ_max = 25.0°, θ_min = 2.1°
Absorption correction: multi-scan (SADABS; Sheldrick, 2000)	h = −14→7
T_min = 0.643, T_max = 0.760	k = −9→9
3814 measured reflections	l = −11→11

Refinement top

Refinement on F²	Secondary atom site location: difference Fourier map
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F² > 2σ(F²)] = 0.025	H atoms treated by a mixture of independent and constrained refinement
wR(F²) = 0.065	w = 1/[σ²(F_o²) + (0.0309P)² + 0.1108P] where P = (F_o² + 2F_c²)/3
S = 1.07	(Δ/σ)_max < 0.001
1686 reflections	Δρ_max = 0.42 e Å⁻³
141 parameters	Δρ_min = −0.27 e Å⁻³
2 restraints	Absolute structure: Flack (1983), 671 Friedel pairs
Primary atom site location: structure-invariant direct methods	Flack parameter: −0.016 (19)

Crystal data top

K₃[Cu(C₁₀H₁₂N₂O₁₀P)]·2H₂O	V = 958.2 (10) Å³
M_r = 568.06	Z = 2
Orthorhombic, P2₁2₁2	Mo Kα radiation
a = 11.880 (7) Å	µ = 1.94 mm⁻¹
b = 8.332 (5) Å	T = 273 K
c = 9.681 (6) Å	0.25 × 0.20 × 0.15 mm

Data collection top

Bruker SMART CCD area-detector diffractometer	1686 independent reflections
Absorption correction: multi-scan (SADABS; Sheldrick, 2000)	1553 reflections with I > 2σ(I)
T_min = 0.643, T_max = 0.760	R_int = 0.041
3814 measured reflections	θ_max = 25.0°

Refinement top

R[F² > 2σ(F²)] = 0.025	H atoms treated by a mixture of independent and constrained refinement
wR(F²) = 0.065	Δρ_max = 0.42 e Å⁻³
S = 1.07	Δρ_min = −0.27 e Å⁻³
1686 reflections	Absolute structure: Flack (1983), 671 Friedel pairs
141 parameters	Flack parameter: −0.016 (19)
2 restraints

Special details top

Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.
Refinement. Refinement of F² against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F², conventional R-factors R are based on F, with F set to zero for negative F². The threshold expression of F² > σ(F²) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F² are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.

Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.

Refinement. Refinement of F² against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F², conventional R-factors R are based on F, with F set to zero for negative F². The threshold expression of F² > σ(F²) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F² are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å²) top

	x	y	z	U_iso*/U_eq
Cu1	0.5000	0.0000	0.24820 (5)	0.02067 (13)
N1	0.5819 (2)	0.1559 (3)	0.3846 (2)	0.0241 (5)
O1	0.56779 (19)	0.1530 (3)	0.1064 (2)	0.0350 (5)
O2	0.6252 (2)	0.4027 (3)	0.0863 (2)	0.0439 (7)
O3	0.65208 (19)	−0.1264 (3)	0.2638 (3)	0.0431 (6)
O4	0.83096 (19)	−0.0736 (3)	0.3018 (3)	0.0480 (7)
O5	0.6061 (2)	−0.0298 (3)	0.7037 (2)	0.0451 (7)
O6	0.6136 (3)	0.7735 (4)	−0.0772 (3)	0.0451 (7)
K1	0.5000	0.5000	−0.14025 (10)	0.0354 (2)
K2	0.72836 (6)	0.15198 (9)	0.89192 (7)	0.03197 (18)
P1	0.5000	0.0000	0.62460 (10)	0.0294 (3)
C1	0.5802 (3)	0.3100 (4)	0.3092 (3)	0.0309 (8)
H1A	0.6403	0.3779	0.3435	0.037*
H1B	0.5094	0.3641	0.3273	0.037*
C2	0.5938 (3)	0.2890 (4)	0.1561 (4)	0.0279 (7)
C3	0.6992 (3)	0.0996 (4)	0.4033 (4)	0.0314 (7)
H3A	0.7104	0.0719	0.4997	0.038*
H3B	0.7501	0.1871	0.3816	0.038*
C4	0.7300 (3)	−0.0441 (4)	0.3151 (3)	0.0300 (8)
C5	0.5181 (3)	0.1745 (4)	0.5159 (3)	0.0279 (7)
H5B	0.4439	0.2150	0.4930	0.033*
H5A	0.5554	0.2565	0.5703	0.033*
H6A	0.613 (3)	0.835 (5)	−0.158 (3)	0.059 (13)*
H6B	0.569 (4)	0.835 (6)	−0.017 (5)	0.10 (2)*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Cu1	0.0246 (2)	0.0185 (2)	0.0189 (2)	−0.0019 (2)	0.000	0.000
N1	0.0280 (12)	0.0227 (13)	0.0216 (13)	0.0016 (11)	0.0028 (11)	0.0039 (13)
O1	0.0404 (13)	0.0380 (13)	0.0266 (12)	−0.0059 (11)	0.0010 (10)	−0.0022 (12)
O2	0.0466 (15)	0.0481 (16)	0.0369 (14)	−0.0133 (12)	−0.0063 (11)	0.0228 (13)
O3	0.0383 (12)	0.0399 (15)	0.0510 (16)	−0.0032 (12)	0.0113 (12)	−0.0146 (13)
O4	0.0315 (13)	0.0526 (16)	0.0599 (17)	0.0113 (13)	0.0084 (12)	0.0057 (14)
O5	0.0594 (15)	0.0483 (18)	0.0277 (11)	−0.0152 (14)	−0.0179 (11)	0.0126 (11)
O6	0.0528 (17)	0.0480 (16)	0.0346 (16)	0.0074 (13)	0.0055 (13)	0.0145 (13)
K1	0.0282 (4)	0.0441 (6)	0.0339 (5)	0.0023 (6)	0.000	0.000
K2	0.0348 (3)	0.0312 (4)	0.0299 (4)	0.0003 (3)	0.0005 (3)	−0.0034 (3)
P1	0.0408 (6)	0.0328 (6)	0.0145 (5)	−0.0103 (6)	0.000	0.000
C1	0.044 (2)	0.0214 (18)	0.0277 (17)	−0.0030 (14)	0.0002 (15)	0.0030 (14)
C2	0.0219 (15)	0.036 (2)	0.0260 (17)	−0.0021 (15)	−0.0033 (13)	0.0058 (16)
C3	0.0267 (16)	0.0380 (19)	0.0296 (18)	−0.0031 (14)	−0.0025 (13)	0.0026 (16)
C4	0.0267 (15)	0.033 (2)	0.0299 (16)	0.0030 (14)	0.0044 (14)	0.0098 (13)
C5	0.0336 (18)	0.0290 (16)	0.0209 (14)	−0.0030 (14)	0.0033 (13)	−0.0010 (13)

Geometric parameters (Å, °) top

Cu1—O1ⁱ	2.039 (3)	K1—O4^vi	2.618 (3)
Cu1—O1	2.039 (3)	K1—O4^vii	2.618 (3)
Cu1—N1	2.092 (3)	K1—O6^viii	2.718 (3)
Cu1—N1ⁱ	2.092 (3)	K1—O2^viii	2.771 (3)
Cu1—O3ⁱ	2.097 (3)	K2—O2^iv	2.717 (3)
Cu1—O3	2.097 (3)	K2—O3ⁱⁱⁱ	2.775 (3)
N1—C1	1.478 (4)	K2—O6^iv	2.788 (3)
N1—C3	1.482 (4)	K2—O1^ix	2.819 (3)
N1—C5	1.488 (4)	K2—O4ⁱⁱⁱ	3.040 (3)
O1—C2	1.270 (4)	K2—O2^ix	3.067 (3)
O1—K2ⁱⁱ	2.819 (3)	K2—C2^ix	3.225 (4)
O2—C2	1.222 (4)	K2—C4ⁱⁱⁱ	3.267 (4)
O2—K2ⁱⁱⁱ	2.717 (3)	P1—O5ⁱ	1.496 (2)
O2—K1	2.771 (3)	P1—C5ⁱ	1.807 (3)
O2—K2ⁱⁱ	3.067 (3)	P1—C5	1.807 (3)
O3—C4	1.255 (4)	C1—C2	1.501 (5)
O3—K2^iv	2.775 (3)	C1—H1A	0.9700
O4—C4	1.231 (4)	C1—H1B	0.9700
O4—K1^v	2.618 (3)	C2—K2ⁱⁱ	3.225 (4)
O4—K2^iv	3.040 (3)	C3—C4	1.515 (5)
O5—P1	1.496 (2)	C3—H3A	0.9700
O5—K2	2.779 (3)	C3—H3B	0.9700
O6—K1	2.718 (3)	C4—K2^iv	3.267 (4)
O6—K2ⁱⁱⁱ	2.788 (3)	C5—H5B	0.9700
O6—H6A	0.932 (19)	C5—H5A	0.9700
O6—H6B	0.94 (2)

O1ⁱ—Cu1—O1	95.35 (14)	O3ⁱⁱⁱ—K2—O1^ix	138.11 (8)
O1ⁱ—Cu1—N1	175.30 (10)	O5—K2—O1^ix	97.50 (9)
O1—Cu1—N1	81.57 (10)	O6^iv—K2—O1^ix	88.91 (9)
O1ⁱ—Cu1—N1ⁱ	81.57 (10)	O2^iv—K2—O4ⁱⁱⁱ	140.46 (8)
O1—Cu1—N1ⁱ	175.30 (10)	O3ⁱⁱⁱ—K2—O4ⁱⁱⁱ	44.19 (7)
N1—Cu1—N1ⁱ	101.72 (14)	O5—K2—O4ⁱⁱⁱ	83.36 (8)
O1ⁱ—Cu1—O3ⁱ	91.27 (10)	O6^iv—K2—O4ⁱⁱⁱ	106.25 (9)
O1—Cu1—O3ⁱ	94.30 (10)	O1^ix—K2—O4ⁱⁱⁱ	107.17 (8)
N1—Cu1—O3ⁱ	92.50 (10)	O2^iv—K2—O2^ix	136.78 (5)
N1ⁱ—Cu1—O3ⁱ	82.27 (10)	O3ⁱⁱⁱ—K2—O2^ix	94.85 (8)
O1ⁱ—Cu1—O3	94.30 (10)	O5—K2—O2^ix	124.36 (8)
O1—Cu1—O3	91.27 (10)	O6^iv—K2—O2^ix	68.10 (9)
N1—Cu1—O3	82.27 (10)	O1^ix—K2—O2^ix	43.61 (7)
N1ⁱ—Cu1—O3	92.50 (10)	O4ⁱⁱⁱ—K2—O2^ix	76.91 (8)
O3ⁱ—Cu1—O3	171.73 (14)	O2^iv—K2—C2^ix	121.76 (9)
C1—N1—C3	110.4 (3)	O3ⁱⁱⁱ—K2—C2^ix	116.68 (9)
C1—N1—C5	108.9 (3)	O5—K2—C2^ix	116.98 (9)
C3—N1—C5	114.1 (2)	O6^iv—K2—C2^ix	72.25 (9)
C1—N1—Cu1	102.74 (19)	O1^ix—K2—C2^ix	23.02 (8)
C3—N1—Cu1	108.5 (2)	O4ⁱⁱⁱ—K2—C2^ix	96.20 (9)
C5—N1—Cu1	111.52 (19)	O2^ix—K2—C2^ix	22.22 (7)
C2—O1—Cu1	113.5 (2)	O2^iv—K2—C4ⁱⁱⁱ	122.90 (9)
C2—O1—K2ⁱⁱ	96.7 (2)	O3ⁱⁱⁱ—K2—C4ⁱⁱⁱ	22.10 (7)
Cu1—O1—K2ⁱⁱ	139.57 (12)	O5—K2—C4ⁱⁱⁱ	95.70 (9)
C2—O2—K2ⁱⁱⁱ	138.2 (2)	O6^iv—K2—C4ⁱⁱⁱ	90.64 (9)
C2—O2—K1	120.0 (2)	O1^ix—K2—C4ⁱⁱⁱ	123.49 (8)
K2ⁱⁱⁱ—O2—K1	100.46 (8)	O4ⁱⁱⁱ—K2—C4ⁱⁱⁱ	22.13 (7)
C2—O2—K2ⁱⁱ	86.2 (2)	O2^ix—K2—C4ⁱⁱⁱ	84.76 (8)
K2ⁱⁱⁱ—O2—K2ⁱⁱ	108.21 (9)	C2^ix—K2—C4ⁱⁱⁱ	106.68 (9)
K1—O2—K2ⁱⁱ	85.89 (8)	O2^iv—K2—K1^ix	176.86 (6)
C4—O3—Cu1	113.0 (2)	O3ⁱⁱⁱ—K2—K1^ix	79.73 (7)
C4—O3—K2^iv	101.58 (19)	O5—K2—K1^ix	89.39 (7)
Cu1—O3—K2^iv	137.40 (12)	O6^iv—K2—K1^ix	104.17 (8)
C4—O4—K1^v	139.7 (2)	O1^ix—K2—K1^ix	66.08 (6)
C4—O4—K2^iv	89.3 (2)	O4ⁱⁱⁱ—K2—K1^ix	41.09 (5)
K1^v—O4—K2^iv	89.16 (9)	O2^ix—K2—K1^ix	43.94 (5)
P1—O5—K2	133.30 (16)	C2^ix—K2—K1^ix	57.76 (7)
K1—O6—K2ⁱⁱⁱ	100.04 (10)	C4ⁱⁱⁱ—K2—K1^ix	59.39 (6)
K1—O6—H6A	106 (3)	O2^iv—K2—K1^iv	40.23 (5)
K2ⁱⁱⁱ—O6—H6A	138 (3)	O3ⁱⁱⁱ—K2—K1^iv	96.76 (7)
K1—O6—H6B	109 (4)	O5—K2—K1^iv	127.58 (7)
K2ⁱⁱⁱ—O6—H6B	100 (3)	O6^iv—K2—K1^iv	39.37 (7)
H6A—O6—H6B	102 (4)	O1^ix—K2—K1^iv	95.67 (7)
O4^vi—K1—O4^vii	106.63 (14)	O4ⁱⁱⁱ—K2—K1^iv	138.99 (5)
O4^vi—K1—O6	108.58 (9)	O2^ix—K2—K1^iv	99.24 (6)
O4^vii—K1—O6	87.12 (9)	C2^ix—K2—K1^iv	91.93 (7)
O4^vi—K1—O6^viii	87.12 (9)	C4ⁱⁱⁱ—K2—K1^iv	117.81 (7)
O4^vii—K1—O6^viii	108.58 (9)	K1^ix—K2—K1^iv	141.64 (3)
O6—K1—O6^viii	154.05 (12)	O2^iv—K2—K2^xii	125.03 (7)
O4^vi—K1—O2	162.36 (8)	O3ⁱⁱⁱ—K2—K2^xii	66.12 (7)
O4^vii—K1—O2	89.57 (9)	O5—K2—K2^xii	146.49 (6)
O6—K1—O2	78.53 (9)	O6^iv—K2—K2^xii	46.87 (7)
O6^viii—K1—O2	80.99 (9)	O1^ix—K2—K2^xii	75.11 (6)
O4^vi—K1—O2^viii	89.57 (9)	O4ⁱⁱⁱ—K2—K2^xii	68.44 (7)
O4^vii—K1—O2^viii	162.36 (8)	O2^ix—K2—K2^xii	33.39 (5)
O6—K1—O2^viii	80.99 (9)	C2^ix—K2—K2^xii	52.12 (7)
O6^viii—K1—O2^viii	78.53 (9)	C4ⁱⁱⁱ—K2—K2^xii	64.45 (7)
O2—K1—O2^viii	75.37 (12)	K1^ix—K2—K2^xii	57.52 (3)
O4^vi—K1—K2^x	49.75 (7)	K1^iv—K2—K2^xii	85.90 (3)
O4^vii—K1—K2^x	137.69 (7)	O5—P1—O5ⁱ	118.4 (2)
O6—K1—K2^x	73.15 (8)	O5—P1—C5ⁱ	105.36 (15)
O6^viii—K1—K2^x	104.76 (8)	O5ⁱ—P1—C5ⁱ	109.36 (14)
O2—K1—K2^x	121.11 (7)	O5—P1—C5	109.36 (14)
O2^viii—K1—K2^x	50.17 (6)	O5ⁱ—P1—C5	105.37 (15)
O4^vi—K1—K2ⁱⁱ	137.69 (7)	C5ⁱ—P1—C5	108.8 (2)
O4^vii—K1—K2ⁱⁱ	49.75 (7)	N1—C1—C2	112.7 (3)
O6—K1—K2ⁱⁱ	104.76 (8)	N1—C1—H1A	109.1
O6^viii—K1—K2ⁱⁱ	73.15 (8)	C2—C1—H1A	109.1
O2—K1—K2ⁱⁱ	50.17 (6)	N1—C1—H1B	109.1
O2^viii—K1—K2ⁱⁱ	121.11 (7)	C2—C1—H1B	109.1
K2^x—K1—K2ⁱⁱ	171.03 (3)	H1A—C1—H1B	107.8
O4^vi—K1—K2ⁱⁱⁱ	148.97 (7)	O2—C2—O1	123.8 (3)
O4^vii—K1—K2ⁱⁱⁱ	79.86 (7)	O2—C2—C1	119.3 (3)
O6—K1—K2ⁱⁱⁱ	40.59 (6)	O1—C2—C1	116.9 (3)
O6^viii—K1—K2ⁱⁱⁱ	120.23 (7)	O2—C2—K2ⁱⁱ	71.6 (2)
O2—K1—K2ⁱⁱⁱ	39.30 (6)	O1—C2—K2ⁱⁱ	60.27 (17)
O2^viii—K1—K2ⁱⁱⁱ	82.64 (7)	C1—C2—K2ⁱⁱ	151.4 (2)
K2^x—K1—K2ⁱⁱⁱ	104.95 (4)	N1—C3—C4	114.1 (3)
K2ⁱⁱ—K1—K2ⁱⁱⁱ	69.69 (4)	N1—C3—H3A	108.7
O4^vi—K1—K2^xi	79.86 (7)	C4—C3—H3A	108.7
O4^vii—K1—K2^xi	148.97 (7)	N1—C3—H3B	108.7
O6—K1—K2^xi	120.23 (7)	C4—C3—H3B	108.7
O6^viii—K1—K2^xi	40.59 (6)	H3A—C3—H3B	107.6
O2—K1—K2^xi	82.64 (7)	O4—C4—O3	124.7 (3)
O2^viii—K1—K2^xi	39.30 (6)	O4—C4—C3	116.8 (3)
K2^x—K1—K2^xi	69.69 (4)	O3—C4—C3	118.5 (3)
K2ⁱⁱ—K1—K2^xi	104.95 (4)	O4—C4—K2^iv	68.5 (2)
K2ⁱⁱⁱ—K1—K2^xi	110.52 (5)	O3—C4—K2^iv	56.32 (16)
O2^iv—K2—O3ⁱⁱⁱ	102.89 (9)	C3—C4—K2^iv	174.0 (2)
O2^iv—K2—O5	88.23 (9)	N1—C5—P1	118.3 (2)
O3ⁱⁱⁱ—K2—O5	105.91 (9)	N1—C5—H5B	107.7
O2^iv—K2—O6^iv	78.25 (9)	P1—C5—H5B	107.7
O3ⁱⁱⁱ—K2—O6^iv	76.29 (9)	N1—C5—H5A	107.7
O5—K2—O6^iv	166.42 (9)	P1—C5—H5A	107.7
O2^iv—K2—O1^ix	112.22 (8)	H5B—C5—H5A	107.1

O1ⁱ—Cu1—N1—C1	79.0 (13)	K2ⁱⁱⁱ—O2—K1—K2ⁱⁱ	107.77 (9)
O1—Cu1—N1—C1	29.69 (19)	C2—O2—K1—K2ⁱⁱⁱ	169.1 (3)
N1ⁱ—Cu1—N1—C1	−146.9 (2)	K2ⁱⁱ—O2—K1—K2ⁱⁱⁱ	−107.77 (9)
O3ⁱ—Cu1—N1—C1	−64.3 (2)	C2—O2—K1—K2^xi	33.3 (3)
O3—Cu1—N1—C1	122.1 (2)	K2ⁱⁱⁱ—O2—K1—K2^xi	−135.71 (8)
O1ⁱ—Cu1—N1—C3	−38.0 (13)	K2ⁱⁱ—O2—K1—K2^xi	116.52 (6)
O1—Cu1—N1—C3	−87.3 (2)	P1—O5—K2—O2^iv	179.09 (18)
N1ⁱ—Cu1—N1—C3	96.1 (2)	P1—O5—K2—O3ⁱⁱⁱ	−78.01 (19)
O3ⁱ—Cu1—N1—C3	178.8 (2)	P1—O5—K2—O6^iv	−175.5 (3)
O3—Cu1—N1—C3	5.2 (2)	P1—O5—K2—O1^ix	66.90 (19)
O1ⁱ—Cu1—N1—C5	−164.5 (12)	P1—O5—K2—O4ⁱⁱⁱ	−39.62 (17)
O1—Cu1—N1—C5	146.2 (2)	P1—O5—K2—O2^ix	29.5 (2)
N1ⁱ—Cu1—N1—C5	−30.36 (16)	P1—O5—K2—C2^ix	54.0 (2)
O3ⁱ—Cu1—N1—C5	52.3 (2)	P1—O5—K2—C4ⁱⁱⁱ	−58.02 (19)
O3—Cu1—N1—C5	−121.3 (2)	P1—O5—K2—K1^ix	1.13 (17)
O1ⁱ—Cu1—O1—C2	162.8 (3)	P1—O5—K2—K1^iv	170.04 (14)
N1—Cu1—O1—C2	−20.8 (2)	P1—O5—K2—K2^xii	−7.4 (3)
N1ⁱ—Cu1—O1—C2	113.9 (12)	K2—O5—P1—O5ⁱ	−60.87 (14)
O3ⁱ—Cu1—O1—C2	71.1 (2)	K2—O5—P1—C5ⁱ	176.51 (17)
O3—Cu1—O1—C2	−102.8 (2)	K2—O5—P1—C5	59.7 (2)
O1ⁱ—Cu1—O1—K2ⁱⁱ	−62.18 (14)	C3—N1—C1—C2	79.8 (4)
N1—Cu1—O1—K2ⁱⁱ	114.25 (17)	C5—N1—C1—C2	−154.1 (3)
N1ⁱ—Cu1—O1—K2ⁱⁱ	−111.0 (12)	Cu1—N1—C1—C2	−35.8 (3)
O3ⁱ—Cu1—O1—K2ⁱⁱ	−153.86 (17)	K2ⁱⁱⁱ—O2—C2—O1	−144.8 (3)
O3—Cu1—O1—K2ⁱⁱ	32.26 (16)	K1—O2—C2—O1	51.4 (4)
O1ⁱ—Cu1—O3—C4	161.4 (2)	K2ⁱⁱ—O2—C2—O1	−31.6 (3)
O1—Cu1—O3—C4	65.9 (2)	K2ⁱⁱⁱ—O2—C2—C1	37.7 (5)
N1—Cu1—O3—C4	−15.4 (2)	K1—O2—C2—C1	−126.1 (3)
N1ⁱ—Cu1—O3—C4	−116.9 (2)	K2ⁱⁱ—O2—C2—C1	150.9 (3)
O3ⁱ—Cu1—O3—C4	−66.4 (2)	K2ⁱⁱⁱ—O2—C2—K2ⁱⁱ	−113.2 (3)
O1ⁱ—Cu1—O3—K2^iv	19.87 (17)	K1—O2—C2—K2ⁱⁱ	83.01 (17)
O1—Cu1—O3—K2^iv	−75.59 (17)	Cu1—O1—C2—O2	−172.6 (3)
N1—Cu1—O3—K2^iv	−156.91 (18)	K2ⁱⁱ—O1—C2—O2	34.9 (3)
N1ⁱ—Cu1—O3—K2^iv	101.60 (17)	Cu1—O1—C2—C1	5.0 (4)
O3ⁱ—Cu1—O3—K2^iv	152.06 (16)	K2ⁱⁱ—O1—C2—C1	−147.5 (3)
K2ⁱⁱⁱ—O6—K1—O4^vi	175.67 (8)	Cu1—O1—C2—K2ⁱⁱ	152.51 (19)
K2ⁱⁱⁱ—O6—K1—O4^vii	−77.75 (11)	N1—C1—C2—O2	−159.6 (3)
K2ⁱⁱⁱ—O6—K1—O6^viii	50.96 (7)	N1—C1—C2—O1	22.7 (4)
K2ⁱⁱⁱ—O6—K1—O2	12.40 (8)	N1—C1—C2—K2ⁱⁱ	−53.8 (6)
K2ⁱⁱⁱ—O6—K1—O2^viii	89.18 (10)	C1—N1—C3—C4	−108.3 (3)
K2ⁱⁱⁱ—O6—K1—K2^x	140.16 (9)	C5—N1—C3—C4	128.6 (3)
K2ⁱⁱⁱ—O6—K1—K2ⁱⁱ	−30.77 (9)	Cu1—N1—C3—C4	3.6 (3)
K2ⁱⁱⁱ—O6—K1—K2^xi	86.76 (10)	K1^v—O4—C4—O3	92.5 (5)
C2—O2—K1—O4^vi	40.5 (5)	K2^iv—O4—C4—O3	4.6 (3)
K2ⁱⁱⁱ—O2—K1—O4^vi	−128.5 (3)	K1^v—O4—C4—C3	−89.3 (4)
K2ⁱⁱ—O2—K1—O4^vi	123.7 (3)	K2^iv—O4—C4—C3	−177.2 (2)
C2—O2—K1—O4^vii	−116.5 (3)	K1^v—O4—C4—K2^iv	87.9 (3)
K2ⁱⁱⁱ—O2—K1—O4^vii	74.40 (9)	Cu1—O3—C4—O4	−159.7 (3)
K2ⁱⁱ—O2—K1—O4^vii	−33.37 (7)	K2^iv—O3—C4—O4	−5.2 (4)
C2—O2—K1—O6	156.3 (3)	Cu1—O3—C4—C3	22.1 (3)
K2ⁱⁱⁱ—O2—K1—O6	−12.74 (9)	K2^iv—O3—C4—C3	176.7 (2)
K2ⁱⁱ—O2—K1—O6	−120.52 (9)	Cu1—O3—C4—K2^iv	−154.5 (2)
C2—O2—K1—O6^viii	−7.7 (3)	N1—C3—C4—O4	163.9 (3)
K2ⁱⁱⁱ—O2—K1—O6^viii	−176.70 (10)	N1—C3—C4—O3	−17.8 (4)
K2ⁱⁱ—O2—K1—O6^viii	75.52 (8)	N1—C3—C4—K2^iv	10 (2)
C2—O2—K1—O2^viii	72.7 (3)	C1—N1—C5—P1	176.6 (2)
K2ⁱⁱⁱ—O2—K1—O2^viii	−96.30 (12)	C3—N1—C5—P1	−59.6 (3)
K2ⁱⁱ—O2—K1—O2^viii	155.92 (11)	Cu1—N1—C5—P1	63.8 (3)
C2—O2—K1—K2^x	94.2 (3)	O5—P1—C5—N1	78.5 (3)
K2ⁱⁱⁱ—O2—K1—K2^x	−74.84 (9)	O5ⁱ—P1—C5—N1	−153.3 (2)
K2ⁱⁱ—O2—K1—K2^x	177.388 (15)	C5ⁱ—P1—C5—N1	−36.14 (18)
C2—O2—K1—K2ⁱⁱ	−83.2 (3)

Symmetry codes: (i) −x+1, −y, z; (ii) x, y, z−1; (iii) −x+3/2, y+1/2, −z+1; (iv) −x+3/2, y−1/2, −z+1; (v) −x+3/2, y−1/2, −z; (vi) x−1/2, −y+1/2, −z; (vii) −x+3/2, y+1/2, −z; (viii) −x+1, −y+1, z; (ix) x, y, z+1; (x) −x+1, −y+1, z−1; (xi) x−1/2, −y+1/2, −z+1; (xii) −x+3/2, y+1/2, −z+2.

Hydrogen-bond geometry (Å, °) top

D—H···A	D—H	H···A	D···A	D—H···A
O6—H6A···O5^xiii	0.93 (2)	1.75 (4)	2.682 (4)	173 (4)
O6—H6B···O1^viii	0.94 (2)	2.02 (5)	2.860 (4)	148 (4)

Symmetry codes: (xiii) x, y+1, z−1; (viii) −x+1, −y+1, z.

Table 1
Hydrogen-bond geometry (Å, °) top

D—H···A	D—H	H···A	D···A	D—H···A
O6—H6A···O5ⁱ	0.93 (2)	1.75 (4)	2.682 (4)	173 (4)
O6—H6B···O1ⁱⁱ	0.94 (2)	2.02 (5)	2.860 (4)	148 (4)

Symmetry codes: (i) x, y+1, z−1; (ii) −x+1, −y+1, z.

supplementary materials

Tripotassium (bis{[bis(carboxylatomethyl)amino]methyl}phosphinato)cuprate(II) dihydrate

L. Liu, R. Zhang, P. Fan, Z. Yu and X. Zhang

	Fig. 1. A portion of the crystal structure of (I) showing a coordination environment of Cu^II, atomic numbering and 50% probability displacement ellipsoids [symmetry code: (A) 1 - x, -y, z]. H atoms omitted for clarity.
	Fig. 2. A portion of the crystal structure of (I) showing the positions of K⁺ [symmetry code: (A) 1 - x,-y, z; (B) 1/2 + x,1/2 - y, -z; (C) x,y, -1 + z; (D) -1/2 + x,1/2 - y, 1 - z; (E) 3/2 - x,-1/2 + y,1 - z; (F) 3/2 - x,1/2 + y, 1 - z; (G) x,-1 + y, z; (H) 1 - x,-y,-1 + z; (I) -1/2 + x,-1/2 - y,1 - z; (J) -1/2 + x,1/2 - y,-z]. O6 belongs to the water molecule. H atoms omitted for clarity.